class_docstr: Op with a custom checkpointing implementation.
  
  Defined as part of the test because the MutableHashTable Python code is
  currently in contrib.
class_docstr_tok: ["Op","with","a","custom","checkpointing","implementation",".","Defined","as","part","of","the","test","because","the","MutableHashTable","Python","code","is","currently","in","contrib","."]
code: def _export(self):
      return gen_lookup_ops.lookup_table_export_v2(
          self.table_ref, dtypes.string, dtypes.float32
      )
  
file_path: tensorflow/tensorflow/python/training/saver_test_utils.py
imports: from tensorflow.python.eager import context
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import gen_lookup_ops
  from tensorflow.python.training import saver
label_desc: Use image node_id 8 for calling the CheckpointedOp obj's underlying member method code with example usage: obj._export() and returns: gen_lookup_ops