PropertyHandle propHandle = getPropertyHandle( SimpleDataSet.COLUMN_HINTS_PROP );
PropertyHandle propHandle = getPropertyHandle( IDataSetModel.COLUMN_HINTS_PROP );
	public Iterator columnHintsIterator( )	{		PropertyHandle propHandle = getPropertyHandle( SimpleDataSet.COLUMN_HINTS_PROP );		assert propHandle != null;		return propHandle.iterator( );	}