code: def _create_extractors(col_params):
    
    result = []
    for col_param in col_params:
      result.append(_create_extractor(col_param))
    return result
docs: Creates extractors to extract properties corresponding to 'col_params'.
  
    Args:
      col_params: List of ListSessionGroupsRequest.ColParam protobufs.
    Returns:
      A list of extractor functions. The ith element in the
      returned list extracts the column corresponding to the ith element of
      _request.col_params