code: def send(self, message, arguments=None):
          
          output = clips.data.DataObject(self._env)
          instance = clips.data.DataObject(
              self._env, dtype=CLIPSType.INSTANCE_ADDRESS)
          instance.value = self._ist
  
          args = arguments.encode() if arguments is not None else ffi.NULL
  
          lib.EnvSend(
              self._env, instance.byref, message.encode(), args, output.byref)
  
          return output.value
docs: Send a message to the Instance.
  
          Message arguments must be provided as a string.