code: def testLargeRandomGraph(self):
      with self.session(config=self._util.config) as sess:
          if not test.is_gpu_available(cuda_only=True):
              self.skipTest("No GPU available")
          for _ in range(5):
              if not self._util.TestRandomGraph(sess):
                  return
  
imports: import random
  import numpy
  from google.protobuf import text_format
  from tensorflow.core.protobuf import config_pb2
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import random_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
  from tensorflow.python.platform import tf_logging
label_desc: Use image node_id 3 for calling the VirtualGpuTest obj's underlying member method code with example usage: obj.testLargeRandomGraph() without return types