croak("Cannot convert from '" . $source->type . "' to '" . $destination_type . "'") if !$from_to;
my $is_abbr_any = sub {
- # foreach my $abbr (@_) {
- # croak "no such abbreviation: '$abbr'" if !grep { $_->{abbr} eq $abbr } @from_tos;
- # }
any { $from_to->{abbr} eq $_ } @_;
};