DefinitionTree {
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                comments: CommentGroup {
                    comments: [],
                },
                attributes: [],
                interface: Keyword {
                    value: "interface",
                    position: 0,
                },
                name: Identifier {
                    position: 10,
                    value: "s",
                },
                templates: None,
                extends: None,
                body: InterfaceDefinitionBody {
                    left_brace: 12,
                    members: [],
                    right_brace: 13,
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            },
        ),
        Interface(
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                comments: CommentGroup {
                    comments: [],
                },
                attributes: [],
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                    value: "interface",
                    position: 16,
                },
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                    position: 26,
                    value: "foo",
                },
                templates: None,
                extends: Some(
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                            value: "extends",
                            position: 30,
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                        parents: CommaSeparated {
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                                        position: 38,
                                        value: "s",
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                                    templates: None,
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                            commas: [],
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                body: InterfaceDefinitionBody {
                    left_brace: 40,
                    members: [
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                                comments: CommentGroup {
                                    comments: [],
                                },
                                attributes: [],
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                                    modifiers: [
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                                },
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                                    position: 53,
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                                name: Identifier {
                                    position: 62,
                                    value: "bar",
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                                templates: None,
                                parameters: MethodParameterListDefinition {
                                    comments: CommentGroup {
                                        comments: [],
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                                    left_parenthesis: 65,
                                    parameters: CommaSeparated {
                                        inner: [],
                                        commas: [],
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                                    right_parenthesis: 66,
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                                        type_definition: Identifier(
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                                                    value: "parent",
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                                                templates: None,
                                            },
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                                    },
                                ),
                                constraints: None,
                                body: Abstract(
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                                ),
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                        ),
                    ],
                    right_brace: 77,
                },
            },
        ),
    ],
    eof: 79,
}