docs: def import_eit_fzj(self, filename, configfile, correction_file=None,
                         timestep=None, **kwargs):
          """EIT data import for FZJ Medusa systems"""
          # we get not electrode positions (dummy1) and no topography data
          # (dummy2)
          df_emd, dummy1, dummy2 = eit_fzj.read_3p_data(
              filename,
              configfile,
              **kwargs
          )
          if correction_file is not None:
              eit_fzj_utils.apply_correction_factors(df_emd, correction_file)
  
          if timestep is not None:
              df_emd['timestep'] = timestep
  
          self._add_to_container(df_emd)
  
          print('Summary:')
          self._describe_data(df_emd)