private boolean isGroupFilter( IFilterDefinition filter )
private boolean isGroupFilter( IFilterDefinition filter ) throws DataException
	private boolean isGroupFilter( IFilterDefinition filter )	{		IBaseExpression expr = filter.getExpression( );		if ( expr instanceof IConditionalExpression )		{			try			{				if ( odiQuery instanceof BaseQuery )				{					return ( (BaseQuery) odiQuery ).getExprProcessor( )							.hasAggregation( expr );				}			}			catch ( DataException e )			{				return true;			}		}		return false;	}