code: def testAxisAlignedDirection(self):
      direction = [0, 1, 0]
      scalarizer = multi_objective_scalarizer.HyperVolumeScalarizer(
          direction, self._hv_params
      )
      self.assertAllEqual(
          self.evaluate(scalarizer(self._batch_multi_objectives)),
          self.evaluate(tf.constant([2, 5], 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 7 for calling the HyperVolumeScalarizerTest obj's underlying member method code with example usage: obj.testAxisAlignedDirection() without return types