code: def _browse(cls, env, ids, from_record=None, iterated=None):
          
          records = cls()
          records._env_local = env
          records._ids = _normalize_ids(ids)
          if iterated:
              records._values = iterated._values
              records._values_to_write = iterated._values_to_write
          else:
              records._from_record = from_record
              records._values = {}
              records._values_to_write = {}
              for field in cls._columns:
                  records._values[field] = {}
                  records._values_to_write[field] = {}
              records._init_values()
          return records
docs: Create an instance (a recordset) corresponding to `ids` and
          attached to `env`.
  
          `from_record` parameter is used when the recordset is related to a
          parent record, and as such can take the value of a tuple
          (record, field). This is useful to update the parent record when the
          current recordset is modified.
  
          `iterated` can take the value of an iterated recordset, and no extra
          RPC queries are made to generate the resulting record (recordset and
          its record share the same values).