docs: def csv_dumper(**kwargs):
      """dump data to csv"""
      logging.info("dumping to csv")
      barn = kwargs["barn"]
      farms = kwargs["farms"]
      experiments = kwargs["experiments"]
      for experiment, farm in zip(experiments, farms):
          name = experiment.journal.name
          project = experiment.journal.project
          project_dir, batch_dir, raw_dir = \
              experiment.journal.paginate()
          if batch_dir is None:
              logging.info("have to generate folder-name on the fly")
              out_data_dir, project_dir, batch_dir, raw_dir = \
                  generate_folder_names(name, project)
  
          if barn == "batch_dir":
              out_dir = batch_dir
          elif barn == "project_dir":
              out_dir = project_dir
          elif barn == "raw_dir":
              out_dir = raw_dir
          else:
              out_dir = barn
  
          for animal in farm:
              file_name = os.path.join(
                  out_dir, "summary_%s_%s.csv" % (
                      animal.name,
                      name
                  )
              )
              logging.info(f"> {file_name}")
              animal.to_csv(file_name, sep=prms.Reader.sep)