code: def setUp(self):
      super(HyperVolumeScalarizerTest, self).setUp()
      self._hv_params = [
          multi_objective_scalarizer.HyperVolumeScalarizer.PARAMS(
              slope=1, offset=0
          )
      ] * 3
      self._batch_multi_objectives = tf.constant(
          [[3, 2, 1], [6, 5, 4]], dtype=tf.float32
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import copy
  import tensorflow.compat.v2
  from tf_agents.bandits.multi_objective import multi_objective_scalarizer
label_desc: Use image node_id 1 for calling the HyperVolumeScalarizerTest obj's underlying member method code with example usage: obj.setUp() without return types