code: @Override
      public Serializable invokeCommand(String key, String commandName, Serializable commandData)
                      throws SIConnectionDroppedException, SIConnectionUnavailableException,
                      SINotAuthorizedException, SIResourceException, SIIncorrectCallException,
                      SICommandInvocationFailedException {
  
          return _delegateConnection.invokeCommand(key, commandName, commandData);
  
      }
docs: Calls invokeCommand on the delegate connection.
  
  @throws SINotAuthorizedException
  @throws SICommandInvocationFailedException
  @throws SIIncorrectCallException
  @throws SIResourceException
  @throws SIConnectionUnavailableException
  @throws SIConnectionDroppedException
  @see com.ibm.wsspi.sib.core.SICoreConnection#invokeCommand(java.lang.String, java.lang.String, java.io.Serializable)