code: def test_interpolation_misfit_2d(self, xp, scp, kernel):
      # Make sure that each kernel, with its default `degree` and an
      # appropriate `epsilon`, does a good job at interpolation in 2d.
      seq = Halton(2, scramble=False, seed=_np.random.RandomState())
  
      x = xp.asarray(seq.random(100))
      xitp = xp.asarray(seq.random(100))
  
      y = _2d_test_function(x, xp)
      ytrue = _2d_test_function(xitp, xp)
      yitp = self.build(scp, x, y, epsilon=5.0, kernel=kernel)(xitp)
  
      mse = xp.mean((yitp - ytrue) ** 2)
      assert mse < 2.0e-4
      return yitp
  
imports: import pickle
  import pytest
  import warnings
  import numpy
  from numpy.linalg import LinAlgError
  import cupy
  import cupyx
  from cupy import testing
  import cupyx.scipy.interpolate
  from cupyx.scipy.interpolate._rbfinterp import _AVAILABLE, _SCALE_INVARIANT, _NAME_TO_MIN_DEGREE, NAME_TO_FUNC, _monomial_powers, polynomial_matrix, kernel_matrix
label_desc: Use image node_id 8 for calling the _TestRBFInterpolator obj's underlying member method code with example usage: obj.test_interpolation_misfit_2d(xp, scp, kernel) and returns: yitp