code: def write_data_file(self, data, fn, sort_cols=False, data_format=None):
          
          report.saved_raw_data[fn] = data
          util_functions.write_data_file(data, fn, sort_cols, data_format)
docs: Saves raw data to a dictionary for downstream use, then redirects
          to report.write_data_file() to create the file in the report directory