docstr: Test that the op can reduce a stacked list of tensors.
docstr_tok: ["Test","that","the","op","can","reduce","a","stacked","list","of","tensors","."]
code: def test_feature_bitmask_multiple_tensors_stack(self):
      """Test that the op can reduce a stacked list of tensors."""
      data_1 = constant_op.constant([True, False])
      data_2 = constant_op.constant([False, True])
      stack_data = array_ops_stack.stack([data_1, data_2], -1)
  
      expected_result = constant_op.constant([2, 1])
      result = create_feature_bitmask_op.create_feature_bitmask(
          stack_data
      )
      self.assertAllEqual(expected_result, result)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import array_ops_stack
  from tensorflow.python.platform import test
  from tensorflow_text.python.ops import create_feature_bitmask_op
label_desc: Use image node_id 4 for calling the CreateFeatureBitmaskOpTest obj's underlying member method code with example usage: obj.test_feature_bitmask_multiple_tensors_stack() without return types