DefinitionTree {
    definitions: [
        Enum(
            Unit(
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                    comments: CommentGroup {
                        comments: [],
                    },
                    attributes: [],
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                        line: 1,
                        column: 1,
                        position: 0,
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                    name: Identifier {
                        span: Span {
                            line: 1,
                            column: 6,
                            position: 5,
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                        value: "Foo",
                    },
                    implements: None,
                    body: UnitEnumBodyDefinition {
                        left_brace: Span {
                            line: 1,
                            column: 10,
                            position: 9,
                        },
                        members: [
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                                        line: 2,
                                        column: 5,
                                        position: 15,
                                    },
                                    name: Identifier {
                                        span: Span {
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                                            column: 10,
                                            position: 20,
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                                        column: 13,
                                        position: 23,
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                                        line: 3,
                                        column: 5,
                                        position: 29,
                                    },
                                    name: Identifier {
                                        span: Span {
                                            line: 3,
                                            column: 10,
                                            position: 34,
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                                        position: 37,
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    ],
    eof: Span {
        line: 6,
        column: 1,
        position: 42,
    },
}