code: def test_roundtrip(self):
      a = cp.logspace(-5, 10, 100)
      x = cp.logspace(-5, 10, 100)
  
      y = sc.gammaincinv(a, sc.gammainc(a, x))
      assert_allclose(x, y, rtol=1e-10)
  
imports: import cupy
  import pytest
  import cupyx.scipy.special
  from cupy.testing import assert_allclose, assert_array_equal
label_desc: Use image node_id 8 for calling the TestGammainc obj's underlying member method code with example usage: obj.test_roundtrip() without return types