code: def get_sdk_download_stream(self, rest_api_id,
                                  api_gateway_stage=DEFAULT_STAGE_NAME,
                                  sdk_type='javascript'):
          # type: (str, str, str) -> file
          
          response = self._client('apigateway').get_sdk(
              restApiId=rest_api_id, stageName=api_gateway_stage,
              sdkType=sdk_type)
          return response['body']
docs: Generate an SDK for a given SDK.
  
          Returns a file like object that streams a zip contents for the
          generated SDK.