Bug 198270 Copying an aggregate does not make a copy, only a reference
In a table with groups or multiple columns, create an aggregate in a footer or a header. Copy the aggregate to another cell in a footer or a header. Make changes to the new aggregate appropriate to its new location. Expected result: The changes appear in only the new copy of the aggregate. Actual result: The changes appear in both aggregates because the new aggregate is not a copy, but a reference to the same aggregate as the original.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/BindingDialogHelper.java
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( ) );
			}
		}
		catch ( BirtException e )
		{
			ExceptionHandler.handle( e );
		}
		return argList;
	}
	public void save( ) throws Exception
	{
		if ( isRef )