=item columnflag - null or empty (no default), `D' for default, `F' for fixed (unchangeable), `S' for selectable choice, `M' for manual selection from inventory, `A' for automatic selection from inventory, or `H' for selection from a hardware class. For virtual fields, can also be 'X' for excluded.
+=item required - column value expected to be true
+
=back
=head1 METHODS
|| $self->ut_alpha('columnname')
|| $self->ut_textn('columnlabel')
|| $self->ut_anything('columnvalue')
+ || $self->ut_flag('required')
;
return $error if $error;