code: def _missing_required_parameters(rqset, **kwargs):
      
      key_set = set(list(iterkeys(kwargs)))
      required_minus_received = rqset - key_set
      if required_minus_received != set():
          return list(required_minus_received)
docs: Helper function to do operation on sets.
  
      Checks for any missing required parameters.
      Returns non-empty or empty list. With empty
      list being False.
  
      ::returns list