Bug 166015 Refactor designer actions to eclipse command framework
Eclipse command framework provide a more explicit way to manage UI actions contributions, we can take it's advantage to make our actions code more clean and maintainable.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dnd/InsertInLayoutUtil.java
{
				container.setDataSet( dataSet );
				containerDataSet = dataSet;
			}
			if ( dataSet.equals( containerDataSet ) && container != null )
			{
				container.addColumnBinding( bindingColumn, false );
			}
			else
			{
				
				dataHandle.setDataSet( dataSet );
				dataHandle.addColumnBinding( bindingColumn, false );
			}