code: def _serialize_to_tensors(self):
      return {"a": self.a, "b": self.b}
  
file_path: tensorflow/tensorflow/python/saved_model/tracing_utils_test.py
imports: from tensorflow.python.eager import def_function
  from tensorflow.python.eager import test
  from tensorflow.python.framework import constant_op
  from tensorflow.python.ops import control_flow_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.saved_model import tracing_utils
  from tensorflow.python.trackable import base
label_desc: Use image node_id 2 for calling the MyTrackable obj's underlying member method code with example usage: obj._serialize_to_tensors() and returns: dict