private void DoWireItemOn( RichItem item ) {
if ( item == null || item.Owner == this ) return;
DoWireItemOff( item );
item.InternalWireToOwner( this );
}
//
// Service
//
private void DoWireItemOff( RichItem item ) {
IRichCollectionOwner itemOwner = item == null ? null : item.Owner;
if ( itemOwner == null ) return;
item.InternalWireToOwner( null );
if (itemOwner != this) itemOwner.Remove( item );
}
