code: def test_wrapper(self):
      P = KroghInterpolator(self.xs, self.ys)
      ki = krogh_interpolate
      assert_almost_equal(
          P(self.test_xs), ki(self.xs, self.ys, self.test_xs)
      )
      assert_almost_equal(
          P.derivative(self.test_xs, 2),
          ki(self.xs, self.ys, self.test_xs, der=2),
      )
      assert_almost_equal(
          P.derivatives(self.test_xs, 2),
          ki(self.xs, self.ys, self.test_xs, der=[0, 1]),
      )
  
imports: import warnings
  import io
  import numpy
  from numpy.testing import assert_almost_equal, assert_array_equal, assert_array_almost_equal, assert_allclose, assert_equal, assert_
  from pytest import raises
  from scipy.interpolate import KroghInterpolator, krogh_interpolate, BarycentricInterpolator, barycentric_interpolate, approximate_taylor_polynomial, CubicHermiteSpline, pchip, PchipInterpolator, pchip_interpolate, Akima1DInterpolator, CubicSpline, make_interp_spline
label_desc: Use image node_id 16 for calling the TestKrogh obj's underlying member method code with example usage: obj.test_wrapper() without return types