DefinitionTree {
    definitions: [
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                    comments: [],
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                attributes: [],
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                    position: 0,
                },
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                    value: "a",
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                templates: None,
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                        comments: [],
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                    left_parenthesis: 10,
                    parameters: CommaSeparated {
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                        commas: [],
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                    right_parenthesis: 11,
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                    left_brace: 20,
                    statements: [
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                                semicolon: 38,
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                    right_brace: 40,
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    eof: 42,
}