code: @Override
      public InstanceInfo getInstanceByAppAndId(String appName, String id) {
          return this.getInstanceByAppAndId(appName, id, true);
      }
docs: Gets the {@link InstanceInfo} information.
  
  @param appName the application name for which the information is requested.
  @param id the unique identifier of the instance.
  @return the information about the instance.