SpaceBefore(
    Backpassing(
        [
            @18-19 Identifier(
                "x",
            ),
        ],
        @23-32 ParensAround(
            Closure(
                [
                    @25-26 Identifier(
                        "y",
                    ),
                ],
                @30-31 Var {
                    module_name: "",
                    ident: "y",
                },
            ),
        ),
        @34-35 SpaceBefore(
            Var {
                module_name: "",
                ident: "x",
            },
            [
                Newline,
                Newline,
            ],
        ),
    ),
    [
        LineComment(
            " leading comment",
        ),
    ],
)