PropertyHandle propHandle = getPropertyHandle( JointDataSet.JOIN_CONDITONS_PROP );
PropertyHandle propHandle = getPropertyHandle( IJointDataSetModel.JOIN_CONDITONS_PROP );
	public Iterator joinConditionsIterator( )	{		PropertyHandle propHandle = getPropertyHandle( JointDataSet.JOIN_CONDITONS_PROP );		assert propHandle != null;		return propHandle.iterator( );	}