code: def test_set_keys_multiple_name(self):
      if self.iterable is np.array:
          self.skipTest("ndarray of strings is not supported")
      self.dataset.keys = self.iterable(("item0", "item2"))
      self.assertEqual(self.dataset.keys, ("item0", "item2"))
      self.assertEqual(self.dataset[3], ("item0(3)", "item2(3)"))
  
imports: import numpy
  import unittest
  from chainercv.chainer_experimental.datasets.sliceable import GetterDataset
  from chainercv.utils import testing
label_desc: Use image node_id 8 for calling the TestGetterDataset obj's underlying member method code with example usage: obj.test_set_keys_multiple_name() without return types