class_docstr: Tests the Grappler remapper optimizer.
code: def setUp(self):
      super(RemapperTest, self).setUp()
      # GeluApproximate fusion on GPU requires cublasLt.
      os.environ["TF_USE_CUBLASLT"] = "1"
      # GeluExact fusion and conv runtime fusion on GPU requires cuDNN frontend.
      os.environ["TF_CUDNN_USE_FRONTEND"] = "1"
      os.environ["TF_CUDNN_USE_RUNTIME_FUSION"] = "1"
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  from absl.testing import parameterized
  from tensorflow.core.protobuf import config_pb2
  from tensorflow.core.protobuf import rewriter_config_pb2
  from tensorflow.python.client import session
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import meta_graph
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.grappler import tf_optimizer
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import init_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import nn
  from tensorflow.python.ops import nn_ops
  from tensorflow.python.ops import random_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import sysconfig
  from tensorflow.python.platform import test
  from tensorflow.python.util import _pywrap_utils
label_desc: Use image node_id 1 for calling the RemapperTest obj's underlying member method code with example usage: obj.setUp() without return types