code: def testSparseRev(self):
      # Note: more comprehensive tests in sparse_test.py:test_bcoo_rev
      rng = jtu.rand_default(self.rng())
  
      M_dense = rng((2, 3, 4), np.float32)
      M_sparse = BCOO.fromdense(M_dense)
      func = self.sparsify(partial(lax.rev, dimensions=(1, 2)))
  
      result_dense = func(M_dense)
      result_sparse = func(M_sparse).todense()
  
      self.assertAllClose(result_sparse, result_dense)
  
imports: from functools import partial
  import math
  import operator
  from absl.testing import absltest
  from absl.testing import parameterized
  import numpy
  import jax
  from jax import config, jit, lax
  import jax.numpy
  import jax._src.test_util
  from jax.experimental.sparse import BCOO, BCSR, sparsify, todense, SparseTracer
  from jax.experimental.sparse.transform import arrays_to_spvalues, spvalues_to_arrays, sparsify_raw, SparsifyValue, SparsifyEnv
  from jax.experimental.sparse.util import CuSparseEfficiencyWarning
  from jax.experimental.sparse import test_util
label_desc: Use image node_id 18 for calling the SparsifyTest obj's underlying member method code with example usage: obj.testSparseRev() without return types