docs: def start(self, subthread=True):
          """Starts the loop
  
          Tries to start the loop. Raises RuntimeError if the loop is currently running.
  
          :param subthread: True/False value that specifies whether or not to start the loop within a subthread. If True
          the threading.Thread object is found in Loop._loop_thread.
          """
          if self.is_running():
              raise RuntimeError('Loop is currently running')
          else:
              self._lock.clear()
              self._stop_signal = False  # just in case
              self._in_subthread = subthread
              if subthread:
                  self._loop_thread = threading.Thread(target=self._loop,
                                                       args=self.args,
                                                       kwargs=self.kwargs)
                  self._loop_thread.start()
              else:
                  self._loop(*self.args, **self.kwargs)