code: def testUseExistingGraph(self):
      with ops.Graph().as_default() as g, ops.device("/cpu:0"):
          a = constant_op.constant(6.0, shape=[1, 1])
          b = constant_op.constant(7.0, shape=[1, 1])
          c = math_ops.matmul(a, b, name="matmul")
      with session.Session(graph=g, config=self._config):
          result = c.eval()
          self.assertAllEqual(result, [[42.0]])
  
file_path: tensorflow-upstream/tensorflow/core/tfrt/tfrt_session/tfrt_session_python_test.py
imports: from tensorflow.core.protobuf import config_pb2
  from tensorflow.python.client import session
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import math_ops
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 2 for calling the TfrtSessionPythonTest obj's underlying member method code with example usage: obj.testUseExistingGraph() without return types