code: def test_init_spec_empty(self, dataset: lit_dataset.Dataset):
      self.assertEmpty(dataset.init_spec())
  
imports: import os
  import types
  from absl.testing import absltest
  from absl.testing import parameterized
  from lit_nlp.api import dataset
  from lit_nlp.api import types
  import numpy
label_desc: Use image node_id 1 for calling the DatasetTest obj's underlying member method code with example usage: obj.test_init_spec_empty(dataset) without return types