Bug 140751 using a grid in a table does not update row value
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dnd/InsertInLayoutUtil.java
rule.insert( model );
		}
		return dataHandle;
	}
	private static GroupHandle getGroupHandle( Object target )
	{
		DesignElementHandle handle = null;
		if ( target instanceof CellHandle )
		{
			handle = ( (CellHandle) target ).getContainer( ).getContainer( );
		}
		else if ( target instanceof ListBandProxy )
		{
			handle = ( (ListBandProxy) target ).getElemtHandle( );
		}
		if ( handle instanceof GroupHandle )
		{
			return (GroupHandle) handle;
		}
		return null;
	}
	/**
	 * Inserts invalid column string into the target. Add label if possible
	 * 
	 * @param expression
	 *            invalid column or other expression
	 * @param target
	 *            insert target like cell or ListBandProxy
	 * @return to be inserted data item
	 * @throws SemanticException