docs: @Override
      public Serializable invokeCommand(String key, String commandName, Serializable commandData)
                      throws SIConnectionDroppedException, SIConnectionUnavailableException,
                      SINotAuthorizedException, SIResourceException, SIIncorrectCallException,
                      SICommandInvocationFailedException {
  
          return _delegateConnection.invokeCommand(key, commandName, commandData);
  
      }