When(
    @5-6 Var {
        module_name: "",
        ident: "n",
    },
    [
        WhenBranch {
            patterns: [
                @12-16 SpaceBefore(
                    OpaqueRef(
                        "@Age",
                    ),
                    [
                        Newline,
                    ],
                ),
            ],
            value: @20-21 Num(
                "1",
            ),
            guard: None,
        },
    ],
)