DefinitionTree {
    definitions: [
        Function(
            FunctionDefinition {
                comments: CommentGroup {
                    comments: [],
                },
                attributes: [],
                function: 0,
                name: Identifier {
                    position: 9,
                    value: "a",
                },
                templates: None,
                parameters: FunctionLikeParameterListDefinition {
                    comments: CommentGroup {
                        comments: [],
                    },
                    left_parenthesis: 10,
                    parameters: CommaSeparated {
                        inner: [],
                        commas: [],
                    },
                    right_parenthesis: 11,
                },
                return_type: FunctionLikeReturnTypeDefinition {
                    colon: 12,
                    type_definition: True(
                        14,
                    ),
                },
                body: BlockStatement {
                    comments: CommentGroup {
                        comments: [],
                    },
                    left_brace: 19,
                    statements: [
                        Return(
                            Explicit {
                                comments: CommentGroup {
                                    comments: [],
                                },
                                return: 25,
                                expression: Some(
                                    Literal(
                                        True(
                                            LiteralTrue {
                                                comments: CommentGroup {
                                                    comments: [],
                                                },
                                                position: 32,
                                            },
                                        ),
                                    ),
                                ),
                                semicolon: 36,
                            },
                        ),
                    ],
                    right_brace: 38,
                },
            },
        ),
    ],
    eof: 40,
}