Bug 202398 Aggregaton for List can not aggregate on group [0001]
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/BindingDialogHelper.java
button.setImage( image );
		if ( button.getImage( ) != null )
		{
			button.getImage( ).setBackground( button.getBackground( ) );
		}
	}
	private String getColumnBindingExpressionByName( String name )
	{
		List elementsList = DEUtil.getVisiableColumnBindingsList( this.bindingHolder );
		for ( Iterator iterator = elementsList.iterator( ); iterator.hasNext( ); )
		{
			ComputedColumnHandle binding = (ComputedColumnHandle) iterator.next( );
			if ( binding.getName( ).equals( name ) )
				return binding.getExpression( );
		}
		return null;
	}
	private List getFunctionArgNames( String function )
	{
		List argList = new ArrayList( );
		try
		{
			IAggregationInfo aggregationInfo = DataUtil.getAggregationFactory( )
					.getAggrInfo( function );
			Iterator argumentListIter = aggregationInfo.getParameters( )
					.iterator( );
			for ( ; argumentListIter.hasNext( ); )
			{
				IParameterInfo argInfo = (IParameterInfo) argumentListIter.next( );
				argList.add( argInfo.getDisplayName( ) );