code: def parse_requested_expands(query_key, request):
      
  
      requested_expands = []
  
      for key, val in request.params.items():
          if key == query_key:
              requested_expands += val.split(',')
  
      return requested_expands
docs: Extracts the value of the expand query string parameter from a request.
      Supports comma separated lists.
  
      :param query_key: The name query string parameter.
      :param request: Request instance.
      :return: List of strings representing the values of the expand query string value.