PropertyHandle propHandle = getPropertyHandle( SimpleDataSet.PARAM_BINDINGS_PROP );
PropertyHandle propHandle = getPropertyHandle( ISimpleDataSetModel.PARAM_BINDINGS_PROP );
	public Iterator paramBindingsIterator( )	{		PropertyHandle propHandle = getPropertyHandle( SimpleDataSet.PARAM_BINDINGS_PROP );		assert propHandle != null;		return propHandle.iterator( );	}