Function(
 Function {
  head: Destructured(
   FunctionHeadDestructured {
    ellipsis: true,
    identifier: None,
    arguments: [
     FunctionHeadDestructuredArgument {
      identifier: "config",
      default: None,
     },
     FunctionHeadDestructuredArgument {
      identifier: "pkgs",
      default: None,
     },
     FunctionHeadDestructuredArgument {
      identifier: "lib",
      default: None,
     },
    ],
   },
  ),
  body: LetIn(
   LetIn {
    bindings: [
     KeyValue(
      BindingKeyValue {
       from: [
        Raw(
         PartRaw {
          content: "cfg",
          span: Span {
           start: Position {
            line: 4,
            column: 3,
           },
           end: Position {
            line: 4,
            column: 6,
           },
          },
         },
        ),
       ],
       to: PropertyAccess(
        PropertyAccess {
         expression: Identifier(
          Identifier {
           id: "config",
           span: Span {
            start: Position {
             line: 4,
             column: 9,
            },
            end: Position {
             line: 4,
             column: 15,
            },
           },
          },
         ),
         attribute_path: [
          Raw(
           PartRaw {
            content: "services",
            span: Span {
             start: Position {
              line: 4,
              column: 16,
             },
             end: Position {
              line: 4,
              column: 24,
             },
            },
           },
          ),
          Raw(
           PartRaw {
            content: "mailcatcher",
            span: Span {
             start: Position {
              line: 4,
              column: 25,
             },
             end: Position {
              line: 4,
              column: 36,
             },
            },
           },
          ),
         ],
         default: None,
        },
       ),
      },
     ),
     Inherit(
      BindingInherit {
       from: Some(
        Identifier(
         Identifier {
          id: "lib",
          span: Span {
           start: Position {
            line: 6,
            column: 12,
           },
           end: Position {
            line: 6,
            column: 15,
           },
          },
         },
        ),
       ),
       attributes: [
        Raw(
         PartRaw {
          content: "mkEnableOption",
          span: Span {
           start: Position {
            line: 6,
            column: 17,
           },
           end: Position {
            line: 6,
            column: 31,
           },
          },
         },
        ),
        Raw(
         PartRaw {
          content: "mkIf",
          span: Span {
           start: Position {
            line: 6,
            column: 32,
           },
           end: Position {
            line: 6,
            column: 36,
           },
          },
         },
        ),
        Raw(
         PartRaw {
          content: "mkOption",
          span: Span {
           start: Position {
            line: 6,
            column: 37,
           },
           end: Position {
            line: 6,
            column: 45,
           },
          },
         },
        ),
        Raw(
         PartRaw {
          content: "types",
          span: Span {
           start: Position {
            line: 6,
            column: 46,
           },
           end: Position {
            line: 6,
            column: 51,
           },
          },
         },
        ),
        Raw(
         PartRaw {
          content: "optionalString",
          span: Span {
           start: Position {
            line: 6,
            column: 52,
           },
           end: Position {
            line: 6,
            column: 66,
           },
          },
         },
        ),
       ],
       span: Span {
        start: Position {
         line: 3,
         column: 4,
        },
        end: Position {
         line: 6,
         column: 67,
        },
       },
      },
     ),
    ],
    target: Map(
     Map {
      recursive: false,
      bindings: [
       KeyValue(
        BindingKeyValue {
         from: [
          Raw(
           PartRaw {
            content: "options",
            span: Span {
             start: Position {
              line: 11,
              column: 3,
             },
             end: Position {
              line: 11,
              column: 10,
             },
            },
           },
          ),
         ],
         to: Map(
          Map {
           recursive: false,
           bindings: [
            KeyValue(
             BindingKeyValue {
              from: [
               Raw(
                PartRaw {
                 content: "services",
                 span: Span {
                  start: Position {
                   line: 13,
                   column: 5,
                  },
                  end: Position {
                   line: 13,
                   column: 13,
                  },
                 },
                },
               ),
               Raw(
                PartRaw {
                 content: "mailcatcher",
                 span: Span {
                  start: Position {
                   line: 13,
                   column: 14,
                  },
                  end: Position {
                   line: 13,
                   column: 25,
                  },
                 },
                },
               ),
              ],
              to: Map(
               Map {
                recursive: false,
                bindings: [
                 KeyValue(
                  BindingKeyValue {
                   from: [
                    Raw(
                     PartRaw {
                      content: "enable",
                      span: Span {
                       start: Position {
                        line: 14,
                        column: 7,
                       },
                       end: Position {
                        line: 14,
                        column: 13,
                       },
                      },
                     },
                    ),
                   ],
                   to: FunctionApplication(
                    FunctionApplication {
                     function: Identifier(
                      Identifier {
                       id: "mkEnableOption",
                       span: Span {
                        start: Position {
                         line: 14,
                         column: 16,
                        },
                        end: Position {
                         line: 14,
                         column: 30,
                        },
                       },
                      },
                     ),
                     arguments: [
                      FunctionApplication(
                       FunctionApplication {
                        function: PropertyAccess(
                         PropertyAccess {
                          expression: Identifier(
                           Identifier {
                            id: "lib",
                            span: Span {
                             start: Position {
                              line: 14,
                              column: 32,
                             },
                             end: Position {
                              line: 14,
                              column: 35,
                             },
                            },
                           },
                          ),
                          attribute_path: [
                           Raw(
                            PartRaw {
                             content: "mdDoc",
                             span: Span {
                              start: Position {
                               line: 14,
                               column: 36,
                              },
                              end: Position {
                               line: 14,
                               column: 41,
                              },
                             },
                            },
                           ),
                          ],
                          default: None,
                         },
                        ),
                        arguments: [
                         String(
                          String_ {
                           parts: [
                            Raw(
                             PartRaw {
                              content: "MailCatcher",
                              span: Span {
                               start: Position {
                                line: 14,
                                column: 43,
                               },
                               end: Position {
                                line: 14,
                                column: 54,
                               },
                              },
                             },
                            ),
                           ],
                           span: Span {
                            start: Position {
                             line: 14,
                             column: 42,
                            },
                            end: Position {
                             line: 14,
                             column: 55,
                            },
                           },
                          },
                         ),
                        ],
                       },
                      ),
                     ],
                    },
                   ),
                  },
                 ),
                 KeyValue(
                  BindingKeyValue {
                   from: [
                    Raw(
                     PartRaw {
                      content: "http",
                      span: Span {
                       start: Position {
                        line: 16,
                        column: 7,
                       },
                       end: Position {
                        line: 16,
                        column: 11,
                       },
                      },
                     },
                    ),
                    Raw(
                     PartRaw {
                      content: "ip",
                      span: Span {
                       start: Position {
                        line: 16,
                        column: 12,
                       },
                       end: Position {
                        line: 16,
                        column: 14,
                       },
                      },
                     },
                    ),
                   ],
                   to: FunctionApplication(
                    FunctionApplication {
                     function: Identifier(
                      Identifier {
                       id: "mkOption",
                       span: Span {
                        start: Position {
                         line: 16,
                         column: 17,
                        },
                        end: Position {
                         line: 16,
                         column: 25,
                        },
                       },
                      },
                     ),
                     arguments: [
                      Map(
                       Map {
                        recursive: false,
                        bindings: [
                         KeyValue(
                          BindingKeyValue {
                           from: [
                            Raw(
                             PartRaw {
                              content: "type",
                              span: Span {
                               start: Position {
                                line: 17,
                                column: 9,
                               },
                               end: Position {
                                line: 17,
                                column: 13,
                               },
                              },
                             },
                            ),
                           ],
                           to: PropertyAccess(
                            PropertyAccess {
                             expression: Identifier(
                              Identifier {
                               id: "types",
                               span: Span {
                                start: Position {
                                 line: 17,
                                 column: 16,
                                },
                                end: Position {
                                 line: 17,
                                 column: 21,
                                },
                               },
                              },
                             ),
                             attribute_path: [
                              Raw(
                               PartRaw {
                                content: "str",
                                span: Span {
                                 start: Position {
                                  line: 17,
                                  column: 22,
                                 },
                                 end: Position {
                                  line: 17,
                                  column: 25,
                                 },
                                },
                               },
                              ),
                             ],
                             default: None,
                            },
                           ),
                          },
                         ),
                         KeyValue(
                          BindingKeyValue {
                           from: [
                            Raw(
                             PartRaw {
                              content: "default",
                              span: Span {
                               start: Position {
                                line: 18,
                                column: 9,
                               },
                               end: Position {
                                line: 18,
                                column: 16,
                               },
                              },
                             },
                            ),
                           ],
                           to: String(
                            String_ {
                             parts: [
                              Raw(
                               PartRaw {
                                content: "127.0.0.1",
                                span: Span {
                                 start: Position {
                                  line: 18,
                                  column: 20,
                                 },
                                 end: Position {
                                  line: 18,
                                  column: 29,
                                 },
                                },
                               },
                              ),
                             ],
                             span: Span {
                              start: Position {
                               line: 18,
                               column: 19,
                              },
                              end: Position {
                               line: 18,
                               column: 30,
                              },
                             },
                            },
                           ),
                          },
                         ),
                         KeyValue(
                          BindingKeyValue {
                           from: [
                            Raw(
                             PartRaw {
                              content: "description",
                              span: Span {
                               start: Position {
                                line: 19,
                                column: 9,
                               },
                               end: Position {
                                line: 19,
                                column: 20,
                               },
                              },
                             },
                            ),
                           ],
                           to: FunctionApplication(
                            FunctionApplication {
                             function: PropertyAccess(
                              PropertyAccess {
                               expression: Identifier(
                                Identifier {
                                 id: "lib",
                                 span: Span {
                                  start: Position {
                                   line: 19,
                                   column: 23,
                                  },
                                  end: Position {
                                   line: 19,
                                   column: 26,
                                  },
                                 },
                                },
                               ),
                               attribute_path: [
                                Raw(
                                 PartRaw {
                                  content: "mdDoc",
                                  span: Span {
                                   start: Position {
                                    line: 19,
                                    column: 27,
                                   },
                                   end: Position {
                                    line: 19,
                                    column: 32,
                                   },
                                  },
                                 },
                                ),
                               ],
                               default: None,
                              },
                             ),
                             arguments: [
                              String(
                               String_ {
                                parts: [
                                 Raw(
                                  PartRaw {
                                   content: "The ip address of the http server.",
                                   span: Span {
                                    start: Position {
                                     line: 19,
                                     column: 34,
                                    },
                                    end: Position {
                                     line: 19,
                                     column: 68,
                                    },
                                   },
                                  },
                                 ),
                                ],
                                span: Span {
                                 start: Position {
                                  line: 19,
                                  column: 33,
                                 },
                                 end: Position {
                                  line: 19,
                                  column: 69,
                                 },
                                },
                               },
                              ),
                             ],
                            },
                           ),
                          },
                         ),
                        ],
                        span: Span {
                         start: Position {
                          line: 16,
                          column: 26,
                         },
                         end: Position {
                          line: 20,
                          column: 8,
                         },
                        },
                       },
                      ),
                     ],
                    },
                   ),
                  },
                 ),
                 KeyValue(
                  BindingKeyValue {
                   from: [
                    Raw(
                     PartRaw {
                      content: "http",
                      span: Span {
                       start: Position {
                        line: 22,
                        column: 7,
                       },
                       end: Position {
                        line: 22,
                        column: 11,
                       },
                      },
                     },
                    ),
                    Raw(
                     PartRaw {
                      content: "port",
                      span: Span {
                       start: Position {
                        line: 22,
                        column: 12,
                       },
                       end: Position {
                        line: 22,
                        column: 16,
                       },
                      },
                     },
                    ),
                   ],
                   to: FunctionApplication(
                    FunctionApplication {
                     function: Identifier(
                      Identifier {
                       id: "mkOption",
                       span: Span {
                        start: Position {
                         line: 22,
                         column: 19,
                        },
                        end: Position {
                         line: 22,
                         column: 27,
                        },
                       },
                      },
                     ),
                     arguments: [
                      Map(
                       Map {
                        recursive: false,
                        bindings: [
                         KeyValue(
                          BindingKeyValue {
                           from: [
                            Raw(
                             PartRaw {
                              content: "type",
                              span: Span {
                               start: Position {
                                line: 23,
                                column: 9,
                               },
                               end: Position {
                                line: 23,
                                column: 13,
                               },
                              },
                             },
                            ),
                           ],
                           to: PropertyAccess(
                            PropertyAccess {
                             expression: Identifier(
                              Identifier {
                               id: "types",
                               span: Span {
                                start: Position {
                                 line: 23,
                                 column: 16,
                                },
                                end: Position {
                                 line: 23,
                                 column: 21,
                                },
                               },
                              },
                             ),
                             attribute_path: [
                              Raw(
                               PartRaw {
                                content: "port",
                                span: Span {
                                 start: Position {
                                  line: 23,
                                  column: 22,
                                 },
                                 end: Position {
                                  line: 23,
                                  column: 26,
                                 },
                                },
                               },
                              ),
                             ],
                             default: None,
                            },
                           ),
                          },
                         ),
                         KeyValue(
                          BindingKeyValue {
                           from: [
                            Raw(
                             PartRaw {
                              content: "default",
                              span: Span {
                               start: Position {
                                line: 24,
                                column: 9,
                               },
                               end: Position {
                                line: 24,
                                column: 16,
                               },
                              },
                             },
                            ),
                           ],
                           to: Integer(
                            Integer {
                             value: "1080",
                             span: Span {
                              start: Position {
                               line: 24,
                               column: 19,
                              },
                              end: Position {
                               line: 24,
                               column: 23,
                              },
                             },
                            },
                           ),
                          },
                         ),
                         KeyValue(
                          BindingKeyValue {
                           from: [
                            Raw(
                             PartRaw {
                              content: "description",
                              span: Span {
                               start: Position {
                                line: 25,
                                column: 9,
                               },
                               end: Position {
                                line: 25,
                                column: 20,
                               },
                              },
                             },
                            ),
                           ],
                           to: FunctionApplication(
                            FunctionApplication {
                             function: PropertyAccess(
                              PropertyAccess {
                               expression: Identifier(
                                Identifier {
                                 id: "lib",
                                 span: Span {
                                  start: Position {
                                   line: 25,
                                   column: 23,
                                  },
                                  end: Position {
                                   line: 25,
                                   column: 26,
                                  },
                                 },
                                },
                               ),
                               attribute_path: [
                                Raw(
                                 PartRaw {
                                  content: "mdDoc",
                                  span: Span {
                                   start: Position {
                                    line: 25,
                                    column: 27,
                                   },
                                   end: Position {
                                    line: 25,
                                    column: 32,
                                   },
                                  },
                                 },
                                ),
                               ],
                               default: None,
                              },
                             ),
                             arguments: [
                              String(
                               String_ {
                                parts: [
                                 Raw(
                                  PartRaw {
                                   content: "The port address of the http server.",
                                   span: Span {
                                    start: Position {
                                     line: 25,
                                     column: 34,
                                    },
                                    end: Position {
                                     line: 25,
                                     column: 70,
                                    },
                                   },
                                  },
                                 ),
                                ],
                                span: Span {
                                 start: Position {
                                  line: 25,
                                  column: 33,
                                 },
                                 end: Position {
                                  line: 25,
                                  column: 71,
                                 },
                                },
                               },
                              ),
                             ],
                            },
                           ),
                          },
                         ),
                        ],
                        span: Span {
                         start: Position {
                          line: 22,
                          column: 28,
                         },
                         end: Position {
                          line: 26,
                          column: 8,
                         },
                        },
                       },
                      ),
                     ],
                    },
                   ),
                  },
                 ),
                 KeyValue(
                  BindingKeyValue {
                   from: [
                    Raw(
                     PartRaw {
                      content: "http",
                      span: Span {
                       start: Position {
                        line: 28,
                        column: 7,
                       },
                       end: Position {
                        line: 28,
                        column: 11,
                       },
                      },
                     },
                    ),
                    Raw(
                     PartRaw {
                      content: "path",
                      span: Span {
                       start: Position {
                        line: 28,
                        column: 12,
                       },
                       end: Position {
                        line: 28,
                        column: 16,
                       },
                      },
                     },
                    ),
                   ],
                   to: FunctionApplication(
                    FunctionApplication {
                     function: Identifier(
                      Identifier {
                       id: "mkOption",
                       span: Span {
                        start: Position {
                         line: 28,
                         column: 19,
                        },
                        end: Position {
                         line: 28,
                         column: 27,
                        },
                       },
                      },
                     ),
                     arguments: [
                      Map(
                       Map {
                        recursive: false,
                        bindings: [
                         KeyValue(
                          BindingKeyValue {
                           from: [
                            Raw(
                             PartRaw {
                              content: "type",
                              span: Span {
                               start: Position {
                                line: 29,
                                column: 9,
                               },
                               end: Position {
                                line: 29,
                                column: 13,
                               },
                              },
                             },
                            ),
                           ],
                           to: With(
                            With {
                             expression: Identifier(
                              Identifier {
                               id: "types",
                               span: Span {
                                start: Position {
                                 line: 29,
                                 column: 21,
                                },
                                end: Position {
                                 line: 29,
                                 column: 26,
                                },
                               },
                              },
                             ),
                             target: FunctionApplication(
                              FunctionApplication {
                               function: Identifier(
                                Identifier {
                                 id: "nullOr",
                                 span: Span {
                                  start: Position {
                                   line: 29,
                                   column: 28,
                                  },
                                  end: Position {
                                   line: 29,
                                   column: 34,
                                  },
                                 },
                                },
                               ),
                               arguments: [
                                Identifier(
                                 Identifier {
                                  id: "str",
                                  span: Span {
                                   start: Position {
                                    line: 29,
                                    column: 35,
                                   },
                                   end: Position {
                                    line: 29,
                                    column: 38,
                                   },
                                  },
                                 },
                                ),
                               ],
                              },
                             ),
                             span: Span {
                              start: Position {
                               line: 29,
                               column: 16,
                              },
                              end: Position {
                               line: 29,
                               column: 38,
                              },
                             },
                            },
                           ),
                          },
                         ),
                         KeyValue(
                          BindingKeyValue {
                           from: [
                            Raw(
                             PartRaw {
                              content: "default",
                              span: Span {
                               start: Position {
                                line: 30,
                                column: 9,
                               },
                               end: Position {
                                line: 30,
                                column: 16,
                               },
                              },
                             },
                            ),
                           ],
                           to: Identifier(
                            Identifier {
                             id: "null",
                             span: Span {
                              start: Position {
                               line: 30,
                               column: 19,
                              },
                              end: Position {
                               line: 30,
                               column: 23,
                              },
                             },
                            },
                           ),
                          },
                         ),
                         KeyValue(
                          BindingKeyValue {
                           from: [
                            Raw(
                             PartRaw {
                              content: "description",
                              span: Span {
                               start: Position {
                                line: 31,
                                column: 9,
                               },
                               end: Position {
                                line: 31,
                                column: 20,
                               },
                              },
                             },
                            ),
                           ],
                           to: FunctionApplication(
                            FunctionApplication {
                             function: PropertyAccess(
                              PropertyAccess {
                               expression: Identifier(
                                Identifier {
                                 id: "lib",
                                 span: Span {
                                  start: Position {
                                   line: 31,
                                   column: 23,
                                  },
                                  end: Position {
                                   line: 31,
                                   column: 26,
                                  },
                                 },
                                },
                               ),
                               attribute_path: [
                                Raw(
                                 PartRaw {
                                  content: "mdDoc",
                                  span: Span {
                                   start: Position {
                                    line: 31,
                                    column: 27,
                                   },
                                   end: Position {
                                    line: 31,
                                    column: 32,
                                   },
                                  },
                                 },
                                ),
                               ],
                               default: None,
                              },
                             ),
                             arguments: [
                              String(
                               String_ {
                                parts: [
                                 Raw(
                                  PartRaw {
                                   content: "Prefix to all HTTP paths.",
                                   span: Span {
                                    start: Position {
                                     line: 31,
                                     column: 34,
                                    },
                                    end: Position {
                                     line: 31,
                                     column: 59,
                                    },
                                   },
                                  },
                                 ),
                                ],
                                span: Span {
                                 start: Position {
                                  line: 31,
                                  column: 33,
                                 },
                                 end: Position {
                                  line: 31,
                                  column: 60,
                                 },
                                },
                               },
                              ),
                             ],
                            },
                           ),
                          },
                         ),
                         KeyValue(
                          BindingKeyValue {
                           from: [
                            Raw(
                             PartRaw {
                              content: "example",
                              span: Span {
                               start: Position {
                                line: 32,
                                column: 9,
                               },
                               end: Position {
                                line: 32,
                                column: 16,
                               },
                              },
                             },
                            ),
                           ],
                           to: String(
                            String_ {
                             parts: [
                              Raw(
                               PartRaw {
                                content: "/mailcatcher",
                                span: Span {
                                 start: Position {
                                  line: 32,
                                  column: 20,
                                 },
                                 end: Position {
                                  line: 32,
                                  column: 32,
                                 },
                                },
                               },
                              ),
                             ],
                             span: Span {
                              start: Position {
                               line: 32,
                               column: 19,
                              },
                              end: Position {
                               line: 32,
                               column: 33,
                              },
                             },
                            },
                           ),
                          },
                         ),
                        ],
                        span: Span {
                         start: Position {
                          line: 28,
                          column: 28,
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