instance. Several columns of the newly created object are cleared by
C<to_object> itself: the primary key columns (if any) and the columns
C<itime> and C<mtime> (if the object has such columns).
This function should not be overwritten by sub-classes. Instead,
instance. Several columns of the newly created object are cleared by
C<to_object> itself: the primary key columns (if any) and the columns
C<itime> and C<mtime> (if the object has such columns).
This function should not be overwritten by sub-classes. Instead,