=item hidden - 'Y' to hide this service on invoices, null otherwise.
+=item provision_hold - 'Y' to release package hold when all services marked with this are provisioned
+
=back
=head1 METHODS
|| $self->ut_number('svcpart')
|| $self->ut_number('quantity')
|| $self->ut_enum('hidden', [ '', 'Y' ] )
+ || $self->ut_flag('provision_hold')
;
return $error if $error;