[
    FullOpeningTag(
        FullOpeningTagStatement {
            span: Span {
                line: 1,
                column: 1,
                position: 0,
            },
        },
    ),
    Function(
        FunctionStatement {
            comments: CommentGroup {
                comments: [],
            },
            attributes: [],
            function: Span {
                line: 1,
                column: 7,
                position: 6,
            },
            ampersand: None,
            name: SimpleIdentifier {
                span: Span {
                    line: 1,
                    column: 16,
                    position: 15,
                },
                value: "foo",
            },
            parameters: FunctionParameterList {
                comments: CommentGroup {
                    comments: [],
                },
                left_parenthesis: Span {
                    line: 1,
                    column: 19,
                    position: 18,
                },
                parameters: CommaSeparated {
                    inner: [
                        FunctionParameter {
                            comments: CommentGroup {
                                comments: [],
                            },
                            name: SimpleVariable {
                                span: Span {
                                    line: 1,
                                    column: 51,
                                    position: 50,
                                },
                                name: "$b",
                            },
                            attributes: [],
                            data_type: Some(
                                Union(
                                    [
                                        String(
                                            Span {
                                                line: 1,
                                                column: 20,
                                                position: 19,
                                            },
                                        ),
                                        Array(
                                            Span {
                                                line: 1,
                                                column: 27,
                                                position: 26,
                                            },
                                        ),
                                        Iterable(
                                            Span {
                                                line: 1,
                                                column: 33,
                                                position: 32,
                                            },
                                        ),
                                        Callable(
                                            Span {
                                                line: 1,
                                                column: 42,
                                                position: 41,
                                            },
                                        ),
                                    ],
                                ),
                            ),
                            ellipsis: None,
                            default: None,
                            ampersand: None,
                        },
                    ],
                    commas: [],
                },
                right_parenthesis: Span {
                    line: 1,
                    column: 53,
                    position: 52,
                },
            },
            return_type: None,
            body: FunctionBody {
                comments: CommentGroup {
                    comments: [],
                },
                left_brace: Span {
                    line: 1,
                    column: 55,
                    position: 54,
                },
                statements: [],
                right_brace: Span {
                    line: 1,
                    column: 56,
                    position: 55,
                },
            },
        },
    ),
]