package Extra;

sub open {  # works

    my (undef, $direction, $filename) = @_;

    return open $_[0], $direction, $filename;

    }

# sub open (\$@) {  # works
#
#     my ($sr_fh, $direction, $filename) = @_;
#
#     return open $$sr_fh, $direction, $filename;
#
#     }

1;