code: def test_slice_keys_multiple_index(self):
      dataset = self.dataset.slice[:, self.iterable((0, 2))]
      self.assertIsInstance(dataset, SliceableDataset)
      self.assertEqual(len(dataset), len(self.dataset))
      self.assertEqual(dataset.keys, ("item0", "item2"))
      self.assertEqual(dataset[3], ("item0(3)", "item2(3)"))
  
imports: import numpy
  import six
  import unittest
  from chainercv.chainer_experimental.datasets.sliceable import SliceableDataset
  from chainercv.utils import testing
label_desc: Use image node_id 8 for calling the TestSliceableDataset obj's underlying member method code with example usage: obj.test_slice_keys_multiple_index() without return types