code: def load_pricing_adjustments(self, columns, dts, assets):
          
          out = [None] * len(columns)
          for i, column in enumerate(columns):
              adjs = {}
              for asset in assets:
                  adjs.update(self._get_adjustments_in_range(
                      asset, dts, column))
              out[i] = adjs
          return out
docs: Returns
          -------
          adjustments : list[dict[int -> Adjustment]]
              A list, where each element corresponds to the `columns`, of
              mappings from index to adjustment objects to apply at that index.