code: def assert_multi_images(
      resp: pb.Response, method: str, im_file: str
  ) -> bool:
      assert method == "pred_multi_images"
      img = PILImage.open(im_file)
      arr = np.array(img)
      expected = arr * arr
      return assert_image(
          resp.multipart.fields["result"],
          assert_kind="image/bmp",
          im_file=expected,
      )
  
imports: from __future__ import annotations
  import io
  import os
  import random
  import sys
  import traceback
  import typing
  from functools import partial
  import pytest
  from bentoml._internal.types import LazyType
  from bentoml._internal.utils import LazyLoader
  from bentoml.grpc.utils import import_generated_stubs
  from bentoml.grpc.utils import import_grpc
  from bentoml.testing.grpc import async_client_call
  from bentoml.testing.grpc import create_channel
  from bentoml.testing.grpc import randomize_pb_ndarray
label_desc: Use image node_id 4 for calling a global function with example usage: assert_multi_images(resp, method, im_file) and returns: assert_image