code: def testFindingSparseSolution_SingleBatch(self):
      self._test_finding_sparse_solution(batch_shape=[1])
  
imports: import numpy
  import tensorflow.compat.v1
  import tensorflow.compat.v2
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.optimizer import proximal_hessian_sparse
label_desc: Use image node_id 5 for calling the _ProximalHessianTest obj's underlying member method code with example usage: obj.testFindingSparseSolution_SingleBatch() without return types