docs: def accumulate_nested_doc(nested_path, expr=IDENTITY):
      """
      :param nested_path: THE PATH USED TO EXTRACT THE NESTED RECORDS
      :param expr: FUNCTION USED ON THE NESTED OBJECT TO GET SPECIFIC VALUE
      :return: THE DE_TYPED NESTED OBJECT ARRAY
      """
      name = literal_field(nested_path)
      def output(doc):
          acc = []
          for h in doc.inner_hits[name].hits.hits:
              i = h._nested.offset
              obj = Data()
              for f, v in h.fields.items():
                  local_path = untype_path(relative_field(f, nested_path))
                  obj[local_path] = unwraplist(v)
              # EXTEND THE LIST TO THE LENGTH WE REQUIRE
              for _ in range(len(acc), i+1):
                  acc.append(None)
              acc[i] = expr(obj)
          return acc
      return output