code: def setUp(self):
      super(PruningPolicyTest, self).setUp()
  
      self.params = {
          "pruning_schedule": pruning_schedule.ConstantSparsity(0.5, 0),
          "block_size": (1, 1),
          "block_pooling_type": "AVG",
      }
  
imports: import distutils.version
  import tensorflow
  from tensorflow_model_optimization.python.core.sparsity.keras import prune
  from tensorflow_model_optimization.python.core.sparsity.keras import pruning_policy
  from tensorflow_model_optimization.python.core.sparsity.keras import pruning_schedule
  from tensorflow_model_optimization.python.core.sparsity.keras import pruning_wrapper
label_desc: Use image node_id 1 for calling the PruningPolicyTest obj's underlying member method code with example usage: obj.setUp() without return types