my $cs = ct($self)->{attributes}->{charset} //
croak('body_str was given, but no charset is defined');
my $enc = find_encoding($cs) // croak "unknown encoding `$cs'";
my $cs = ct($self)->{attributes}->{charset} //
croak('body_str was given, but no charset is defined');
my $enc = find_encoding($cs) // croak "unknown encoding `$cs'";