code: def _unregisterHandler(self, handler, shutdown=True):
          
          if handler in self._handlers:
              self._handlers.remove(handler)
              self._logger.removeHandler(handler)
              if shutdown:
                  try:
                      handler.close()
                  except KeyError:
                      # Depending on the Python version, it's possible for this call
                      # to fail most likely because some logging module objects get
                      # garbage collected before the VSGLogger object is.
                      pass
docs: Unregisters the logging handler.
  
          :param handler:  A handler previously registered with this loggger.
          :param shutdown: Flag to shutdown the handler.