code: def test_unbatch(self):
      unbatch_fn = data.UnBatch()
      batched_inputs = [
          # First batch - 3 examples
          (
              np.arange(3 * 2).reshape(3, -1),
              np.arange(3 * 3).reshape(3, -1),
              np.arange(3 * 4).reshape(3, -1),
          ),
          # Second batch - 4 examples
          (
              np.arange(4 * 2).reshape(4, -1),
              np.arange(4 * 3).reshape(4, -1),
              np.arange(4 * 4).reshape(4, -1),
          ),
      ]
      examples = list(unbatch_fn(batched_inputs))
      self.assertLen(examples, 3 + 4)
  
imports: import itertools
  import os
  from absl.testing import absltest
  from absl.testing import parameterized
  import numpy
  from trax import data
label_desc: Use image node_id 40 for calling the InputsTest obj's underlying member method code with example usage: obj.test_unbatch() without return types