docs: def reset(self):
          """
          Resets the executer scheduler internal state.
  
          Raises:
              RuntimeError: is the executor is still running.
          """
          if self.running:
              raise RuntimeError('paco: executor is still running')
  
          self.pool.clear()
          self.observer.clear()
          self.semaphore = asyncio.Semaphore(self.limit, loop=self.loop)