code: def test_get_activations(self):
      act = self.art_model.get_activations(self.x_test_diabetes[:4], 1)
      act_expected = [0, 0, 0, 7.8, 8.5, 0, 5.6, 0, 6.6, 5.8]
      np.testing.assert_array_almost_equal(
          act[0], act_expected, decimal=1
      )
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import logging
  import unittest
  import numpy
  from art.estimators.regression.keras import KerasRegressor
  from tests.utils import TestBase, master_seed, get_tabular_regressor_kr
label_desc: Use image node_id 10 for calling the TestKerasRegressor obj's underlying member method code with example usage: obj.test_get_activations() without return types