code: def setUpClass(cls):
      super(CSRSparseMatrixGradTest, cls).setUpClass()
      cls._gpu_available = test_util.is_gpu_available()
  
file_path: tensorflow-upstream/tensorflow/python/kernel_tests/linalg/sparse/csr_sparse_matrix_grad_test.py
imports: import numpy
  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 gradients_impl
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops.linalg.sparse import sparse_csr_matrix_grad
  from tensorflow.python.ops.linalg.sparse import sparse_csr_matrix_ops
  from tensorflow.python.platform import test
  from tensorflow.python.platform import tf_logging
label_desc: Use image node_id 1 for calling the CSRSparseMatrixGradTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types