code: public static EchoActionRule newInstance(String id, Boolean hidden) {
          EchoActionRule echoActionRule = new EchoActionRule();
          echoActionRule.setActionId(id);
          echoActionRule.setHidden(hidden);
          return echoActionRule;
      }
docs: Returns a new derived instance of EchoActionRule.
  
  @param id the action id
  @param hidden whether to hide result of the action
  @return the echo action rule