code:                     public void execute(String key, ActionMapping mapping) {
                          String name = key.substring(ACTION_PREFIX.length());
                          if (allowDynamicMethodCalls) {
                              int bang = name.indexOf('!');
                              if (bang != -1) {
                                  String method = name.substring(bang + 1);
                                  mapping.setMethod(method);
                                  name = name.substring(0, bang);
                              }
                          }
                          mapping.setName(cleanupActionName(name));
                      }
                  });
  
              }
          };
      }
  
      /**
       * Adds a parameter action.  Should only be called during initialization
       *
       * @param prefix          The string prefix to trigger the action
       * @param parameterAction The parameter action to execute
       * @since 2.1.0
       */
  