code: def test_forward(self):
      embedding = UNITERImageEmbeddings(**self.config)
      output = embedding(
          self.img_feat,
          self.img_pos_feat,
          self.type_embeddings,
          img_masks=None,
      )
      self.assertEqual(list(output.shape), [32, 100, 256])
  
imports: import gc
  import unittest
  import tests.test_utils
  import torch
  from mmf.common.sample import SampleList
  from mmf.models.uniter import UNITERForClassification, UNITERForPretraining, UNITERImageEmbeddings, UNITERModelBase
  from mmf.utils.build import build_model
  from mmf.utils.configuration import Configuration
  from mmf.utils.env import setup_imports, teardown_imports
  from mmf.utils.general import get_current_device
  from omegaconf import OmegaConf
label_desc: Use image node_id 2 for calling the TestUNITERImageEmbeddings obj's underlying member method code with example usage: obj.test_forward() without return types