docs: def shutdown_executors(wait=True):
      """
      Clean-up the resources of all initialized executors.
  
      :param wait:
          If True then shutdown will not return until all running futures have
          finished executing and the resources used by the executors have been
          reclaimed.
      :type wait: bool
  
      :return:
          Shutdown pool executor.
      :rtype: dict[str,dict]
      """
      return {k: shutdown_executor(k, wait) for k in list(_EXECUTORS.keys())}