DefinitionTree {
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                comments: CommentGroup {
                    comments: [],
                },
                attributes: [],
                function: Keyword {
                    value: "function",
                    position: 0,
                },
                name: Identifier {
                    position: 9,
                    value: "foo",
                },
                templates: None,
                parameters: FunctionLikeParameterListDefinition {
                    comments: CommentGroup {
                        comments: [],
                    },
                    left_parenthesis: 12,
                    parameters: CommaSeparated {
                        inner: [],
                        commas: [],
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                    right_parenthesis: 13,
                },
                return_type: FunctionLikeReturnTypeDefinition {
                    colon: 14,
                    type_definition: Void(
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                            position: 16,
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                },
                body: BlockStatement {
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                        comments: [],
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                    left_brace: 21,
                    statements: [
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                                    commas: [],
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                                    comments: CommentGroup {
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                                    left_brace: 30,
                                    statements: [],
                                    right_brace: 41,
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                                elseifs: [],
                                else: None,
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                        ),
                        If(
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                                comments: CommentGroup {
                                    comments: [],
                                },
                                if: Keyword {
                                    value: "if",
                                    position: 48,
                                },
                                conditions: CommaSeparated {
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                                                name: "$a",
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                                },
                                block: BlockStatement {
                                    comments: CommentGroup {
                                        comments: [],
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                                    left_brace: 55,
                                    statements: [],
                                    right_brace: 66,
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                                elseifs: [],
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                        If(
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                                comments: CommentGroup {
                                    comments: [],
                                },
                                if: Keyword {
                                    value: "if",
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                                                position: 80,
                                                name: "$a",
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                                                name: "$b",
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                                        86,
                                        90,
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                                },
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                                    comments: CommentGroup {
                                        comments: [],
                                    },
                                    left_brace: 92,
                                    statements: [],
                                    right_brace: 103,
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                                elseifs: [],
                                else: None,
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                    right_brace: 105,
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    eof: 107,
}