code: def test_cspline2d_iir1(self, xp, scp):
      image = testing.shaped_random(
          (71, 73), xp, xp.float64, scale=1, seed=181819142
      )
      return scp.signal.cspline2d(image, -1.0)
  
imports: import sys
  import unittest
  import pytest
  import cupy
  from cupy import testing
  import cupyx.scipy.signal
  import numpy
label_desc: Use image node_id 1 for calling the TestCSpline2D obj's underlying member method code with example usage: obj.test_cspline2d_iir1(xp, scp) and returns: scp