DefinitionTree {
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                comments: CommentGroup {
                    comments: [],
                },
                attributes: [],
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                    value: "interface",
                    position: 0,
                },
                name: Identifier {
                    position: 10,
                    value: "foo",
                },
                templates: None,
                extends: None,
                body: InterfaceDefinitionBody {
                    left_brace: 14,
                    members: [
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                                comments: CommentGroup {
                                    comments: [],
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                                attributes: [],
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                                    position: 36,
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                                templates: None,
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                                    comments: CommentGroup {
                                        comments: [],
                                    },
                                    left_parenthesis: 39,
                                    parameters: CommaSeparated {
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                                        commas: [],
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                                    right_parenthesis: 40,
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                                    colon: 41,
                                    type_definition: Identifier(
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                                                position: 43,
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                                            templates: None,
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                                constraints: None,
                                semicolon: 49,
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                    right_brace: 51,
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            },
        ),
    ],
    eof: 53,
}