code: public static Object getCurrentRowKey() {
  		UIContext uic = UIContextHolder.getCurrent();
  		if (uic instanceof SubUIContext) {
  			return ((SubUIContext) uic).getRowId();
  		}
  		return null;
  	}
docs: This can be used by column components on a {@link WTable} to determine the current row key.
  
  @return the row key for the current row, or null if no row details