code: @Override
      public void fireEvent(String configName, Optional<String> valueOpt)
      {
          this.emitEvent(configName, valueOpt);
      }
docs: Used by instances of {@link ConfigDynamicMBean} to emit values back to the config system.
  
  @param configName full configuration name from the descriptor
  @param valueOpt   the value to be emitted (if different from last emission)