code: private static IAction createAction(String action) {
          IAction actn = null;
          
          if (!StringUtils.isEmpty(action)) {
              if ((actn = ActionRegistry.getRegisteredAction(action)) == null) {
                  actn = ActionUtil.createAction(null, action);
              }
          }
          
          return actn;
      }
docs: Returns an IAction object given an action.
  
  @param action Action.
  @return Newly created IAction object, or null if action is null or empty.