code: def test_sqil_iterator(self):
      demonstrations = [
          types.Transition(np.array([[1], [2], [3]]), (), (), (), ())
      ]
      replay = [
          reverb.ReplaySample(
              info=(),
              data=types.Transition(
                  np.array([[4], [5], [6]]), (), (), (), ()
              ),
          )
      ]
      sqil_it = builder._generate_sqil_samples(
          iter(demonstrations), iter(replay)
      )
      np.testing.assert_array_equal(
          next(sqil_it).data.observation, np.array([[1], [3], [5]])
      )
      np.testing.assert_array_equal(
          next(sqil_it).data.observation, np.array([[2], [4], [6]])
      )
      self.assertRaises(StopIteration, lambda: next(sqil_it))
  
imports: from acme import types
  from acme.agents.jax.sqil import builder
  import numpy
  import reverb
  from absl.testing import absltest
label_desc: Use image node_id 1 for calling the BuilderTest obj's underlying member method code with example usage: obj.test_sqil_iterator() without return types