code: def _save_checkpoint():
      original_checkpoint = util.Checkpoint(m=_LazyTrivialObjects())
      original_checkpoint.m()
      return original_checkpoint.write(
          os.path.join(test.get_temp_dir(), "ckpt")
      )
  
imports: import os
  import time
  from tensorflow.python.checkpoint import checkpoint
  from tensorflow.python.framework import ops
  from tensorflow.python.module import module
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import control_flow_ops
  from tensorflow.python.ops import gen_io_ops
  from tensorflow.python.platform import test
  from tensorflow.python.trackable import base
  from tensorflow.python.training import py_checkpoint_reader
label_desc: Use image node_id 1 for calling a global function with example usage: _save_checkpoint() and returns: original_checkpoint