code: def test_rbf(self, same_inputs, model, get, gamma):
      activation = stax.Rbf(gamma)
      self._test_activation(
          activation, same_inputs, model, get, rbf_gamma=gamma
      )
  
imports: import itertools
  import random
  from absl.testing import absltest
  from jax import config
  from jax import default_backend
  from jax import grad, jacfwd, jacrev, jit, jvp, value_and_grad
  from jax import random
  import jax.numpy
  import neural_tangents
  from neural_tangents import stax
  from neural_tangents._src.empirical import _DEFAULT_TESTING_NTK_IMPLEMENTATION
  from tests import test_utils
label_desc: Use image node_id 8 for calling the ActivationTest obj's underlying member method code with example usage: obj.test_rbf(same_inputs, model, get, gamma) without return types