DefinitionTree {
    definitions: [
        Constant(
            ConstantDefinition {
                comments: CommentGroup {
                    comments: [],
                },
                const: Keyword {
                    value: "const",
                    position: 0,
                },
                entries: CommaSeparated {
                    inner: [
                        ConstantDefinitionEntry {
                            name: Identifier {
                                position: 6,
                                value: "a",
                            },
                            equals: 8,
                            value: Identifier(
                                Identifier {
                                    position: 10,
                                    value: "\null",
                                },
                            ),
                        },
                    ],
                    commas: [],
                },
                semicolon: 15,
            },
        ),
    ],
    eof: 16,
}