code: def test_multiple_ids(self):
      self.assertTrue(
          download([TEST_CASE_1, TEST_CASE_2, TEST_CASE_3], False)
      )
      self.assertTrue(os.path.isdir(TEST_CASE_1_TARGET))
      self.assertTrue(os.path.isdir(TEST_CASE_2_TARGET))
      self.assertTrue(os.path.isdir(TEST_CASE_3_TARGET))
  
file_path: NiftyNet/tests/download_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import tensorflow
  from niftynet.utilities.download import download
  from niftynet.utilities.niftynet_global_config import NiftyNetGlobalConfig
  from tests.niftynet_testcase import NiftyNetTestCase
label_desc: Use image node_id 3 for calling the NetDownloadTest obj's underlying member method code with example usage: obj.test_multiple_ids() without return types