code: def test_changepoint_with_X1_X2() -> None:
      N = 100
      X = np.linspace(0, 100, N).reshape(N, 1)
      base_k1 = gpflow.kernels.Matern32(lengthscales=0.2)
      base_k2 = gpflow.kernels.Matern32(lengthscales=2.0)
      k = gpflow.kernels.ChangePoints(
          [base_k1, base_k2], [0.0], steepness=5.0
      )
      K = k(X)
      assert K.shape == [N, N]
  
      N2 = 25
      X2 = np.linspace(0, 50, N2).reshape(N2, 1)
      K = k(X, X2)
      assert K.shape == [N, N2]
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_changepoint_with_X1_X2() without return types