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
btnTable.setSelection( false );
				if ( !isRef )
					cmbGroup.setEnabled( true );
				for ( int i = 0; i < groups.length; i++ )
				{
					if ( groups[i].equals( binding.getAggregateOn( ) ) )
					{
						cmbGroup.select( i );
						return;
					}
				}
			}
			else
			{
				btnTable.setSelection( true );
				btnGroup.setSelection( false );
				cmbGroup.select( 0 );
				cmbGroup.setEnabled( false );
			}
		}
		else
		{
			btnGroup.setEnabled( false );
			cmbGroup.setEnabled( false );
			btnTable.setSelection( true );
		}
	}
	private String[] getGroups( )
	{
		if ( getBindingHolder( ) instanceof ListingHandle )