code: def send(self, target, action, *args, **kwargs):
          '''Send a message to ``target`` to perform ``action`` with given
          positional ``args`` and key-valued ``kwargs``.
          Returns a coroutine or a Future.
          '''
          target = self.monitor if target == 'monitor' else target
          mailbox = self.mailbox
          if isinstance(target, ActorProxyMonitor):
              mailbox = target.mailbox
          else:
              actor = self.get_actor(target)
              if isinstance(actor, Actor):
                  # this occur when sending a message from arbiter to monitors or
                  # vice-versa.
                  return command_in_context(action, self, actor, args, kwargs)
              elif isinstance(actor, ActorProxyMonitor):
                  mailbox = actor.mailbox
          if hasattr(mailbox, 'send'):
              # if not mailbox.closed:
              return mailbox.send(action, self, target, args, kwargs)
          else:
              raise CommandError('Cannot execute "%s" in %s. Unknown actor %s.'
                                 % (action, self, target)f send(self, target, action, *args, **kwargs):
          '''Send a message to ``target`` to perform ``action`` with given
          positional ``args`` and key-valued ``kwargs``.
          Returns a coroutine or a Future.
          '''
          target = self.monitor if target == 'monitor' else target
          mailbox = self.mailbox
          if isinstance(target, ActorProxyMonitor):
              mailbox = target.mailbox
          else:
              actor = self.get_actor(target)
              if isinstance(actor, Actor):
                  # this occur when sending a message from arbiter to monitors or
                  # vice-versa.
                  return command_in_context(action, self, actor, args, kwargs)
              elif isinstance(actor, ActorProxyMonitor):
                  mailbox = actor.mailbox
          if hasattr(mailbox, 'send'):
              # if not mailbox.closed:
              return mailbox.send(action, self, target, args, kwargs)
          else:
              raise CommandError('Cannot execute "%s" in %s. Unknown actor %s.'
                                 % (action, self, target))
docs: Send a message to ``target`` to perform ``action`` with given
          positional ``args`` and key-valued ``kwargs``.
          Returns a coroutine or a Future.