the delete method is in ur Setting, deleting ur array elems

class Array is also {
    multi method delete(@array is rw: *@indices) {
        my @result;
        for @indices -> $index {
            my $i = $index >= 0
                        ?? $index
                        !! * + $index;
            @result.push(do { my $workaround = @array[$i] });
            undefine @array[$i];
            if $index == (@array - 1) | -1 {
                @array.pop;
            }
        }
        @array.pop while @array && !defined @array[* - 1];
        return @result;
    }