code: def testZeroLengthDirection(self):
      with self.assertRaisesRegex(ValueError, "nearly-zero vector"):
          direction = [0, 0, 0]
          multi_objective_scalarizer.HyperVolumeScalarizer(
              direction, self._hv_params
          )
  
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 5 for calling the HyperVolumeScalarizerTest obj's underlying member method code with example usage: obj.testZeroLengthDirection() without return types