code: def test_nanmax_axis0(self, xp, dtype):
      a = testing.shaped_random((2, 3, 4), xp, dtype)
      return xp.nanmax(a, axis=0)
  
imports: import warnings
  import numpy
  import pytest
  import cupy
  import cupy._core._accelerator
  from cupy import cuda
  from cupy import testing
label_desc: Use image node_id 3 for calling the TestOrder obj's underlying member method code with example usage: obj.test_nanmax_axis0(xp, dtype) and returns: xp