@0⦊fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        if true⦉@0 {
            if @1⦊false⦉@1 {
                while @4,5⦊true⦉@4,5 @6,8⦊{
                }⦉@6,8
            }@3⦊‸⦉@3
            @9,10,11,12⦊write!(f, "error")⦉@9,10,11,12@14,16,17,18⦊?⦉@14,16,17,18;
        } else @2⦊{
        }⦉@2
        @19⦊Ok(())⦉@19
    }@20⦊‸⦉@20