Bug 136270 Group's data binding column can only be used by the group itself
If you add some data binding columns to a group, these columns can only be used by this group itself. It should has a way to make the child can use the parent group's data binding column.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
{
					return elementName + " - " + displayName; 
				}
				return displayName;
			}
			return elementName;
		}
		return ""; 
	}
	/**
	 * Gets the master page count.
	 * 
	 * @return the count of master page
	 */
	public static int getMasterPageAccount( )
	{
		SlotHandle slotHandle = SessionHandleAdapter.getInstance( )
				.getReportDesignHandle( )
				.getMasterPages( );
		Iterator itor = slotHandle.iterator( );
		int account = 0;
		while ( itor.hasNext( ) )
		{
			account = account + 1;
			itor.next( );
		}
		return account;
	}
	/**
	 * Get default slot id of give container element