code: def _ubridge_send(self, command):
          
  
          if not self._ubridge_hypervisor or not self._ubridge_hypervisor.is_running():
              yield from self._start_ubridge()
          if not self._ubridge_hypervisor or not self._ubridge_hypervisor.is_running():
              raise NodeError("Cannot send command '{}': uBridge is not running".format(command))
          try:
              yield from self._ubridge_hypervisor.send(command)
          except UbridgeError as e:
              raise UbridgeError("{}: {}".format(e, self._ubridge_hypervisor.read_stdout()))
docs: Sends a command to uBridge hypervisor.
  
          :param command: command to send