docs: def base_add_isoquant_data(features, quantfeatures, acc_col, quantacc_col,
                             quantfields):
      """Generic function that takes a peptide or protein table and adds
      quant data from ANOTHER such table."""
      quant_map = get_quantmap(quantfeatures, quantacc_col, quantfields)
      for feature in features:
          feat_acc = feature[acc_col]
          outfeat = {k: v for k, v in feature.items()}
          try:
              outfeat.update(quant_map[feat_acc])
          except KeyError:
              outfeat.update({field: 'NA' for field in quantfields})
          yield outfeat