=head2 Class methods
=head3 biblio
Returns the related Koha::Biblio object for this old hold
=cut
sub biblio {
my ($self) = @_;
my $rs = $self->_result->biblionumber;
return unless $rs;
return Koha::Biblio->_new_from_dbic($rs);
}
=head3 anonymize
$old_hold->anonymize();
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