code: def _create_injector(self, injector):
          
          if injector == "block_info":
              block_info_injector = importlib.import_module(
                  "sawtooth_validator.journal.block_info_injector")
  
              return block_info_injector.BlockInfoInjector(
                  self._state_view_factory, self._signer)
  
          raise UnknownBatchInjectorError(injector)
docs: Returns a new batch injector