code: def test_get_direction(self):
      idx_concept1 = self.cav.concepts.index("concept1")
      cav_directly_from_member = self.cav.cavs[idx_concept1]
      cav_via_get_direction = self.cav.get_direction("concept1")
      for i in range(len(cav_directly_from_member)):
          self.assertEqual(
              cav_directly_from_member[i], cav_via_get_direction[i]
          )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import pickle
  import shutil
  import numpy
  import tensorflow
  from sklearn import linear_model
  from six.moves import range
  from tcav.cav import CAV, get_or_train_cav
  from tensorflow.python.platform import flags
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 9 for calling the CavTest obj's underlying member method code with example usage: obj.test_get_direction() without return types