code: def test_getMultImageDataByIds(self):
      returnedImageDatas: Dict[
          str, ImageData
      ] = self.imageDataExtractor.getMultImageDataByIds(
          ids=["imageId_1", "imageId_3", "dummy"]
      )
      self.assertEqual(2, len(returnedImageDatas))
  
      imageDataWithimageId_1 = returnedImageDatas["imageId_1"]
      imageDataWithimageId_3 = returnedImageDatas["imageId_3"]
      self.assertTrue(
          self.areEqual(
              self.nameToImageData["imageId_1"], imageDataWithimageId_1
          )
      )
      self.assertTrue(
          self.areEqual(
              self.nameToImageData["imageId_3"], imageDataWithimageId_3
          )
      )
  
imports: import sys
  import unittest
  from typing import Dict, List
  from MONAILabelReviewerLib.ImageData import ImageData
  from MONAILabelReviewerLib.ImageDataExtractor import ImageDataExtractor
  from MONAILabelReviewerLib.MONAILabelReviewerEnum import Level, SegStatus
label_desc: Use image node_id 26 for calling the ImageDataExtractorTest obj's underlying member method code with example usage: obj.test_getMultImageDataByIds() without return types