class_docstr: Base class for testing TFRecord-based features.
code: def _next_actual_batch(self, label_key_provided=False):
      return self._run_actual_batch(self.outputs, label_key_provided)
  
imports: import os
  from tensorflow.core.example import example_pb2
  from tensorflow.core.example import feature_pb2
  from tensorflow.python.data.experimental.ops import readers
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.ops import readers
  from tensorflow.python.framework import dtypes
  from tensorflow.python.lib.io import python_io
  from tensorflow.python.ops import parsing_ops
  from tensorflow.python.util import compat
label_desc: Use image node_id 8 for calling the FeaturesTestBase obj's underlying member method code with example usage: obj._next_actual_batch(label_key_provided) and returns: self