docs: def sendBoxCommand(self, command, box, requiresAnswer=True):
          """
          Send a command across the wire with the given C{juice.Box}.
  
          Returns a Deferred which fires with the response C{juice.Box} when it
          is received, or fails with a C{juice.RemoteJuiceError} if an error is
          received.
  
          If the Deferred fails and the error is not handled by the caller of
          this method, the failure will be logged and the connection dropped.
          """
          if self._outstandingRequests is None:
              return fail(CONNECTION_LOST)
          box[COMMAND] = command
          tag = self._nextTag()
          if requiresAnswer:
              box[ASK] = tag
              result = self._outstandingRequests[tag] = Deferred()
          else:
              result = None
          box.sendTo(self)
          return result