code: def test_nextafter_float(self, xp, dtype):
      a = xp.array([-5, -3, 3, 5], dtype=dtype)[:, None]
      b = xp.array([-xp.inf, -4, 0, 4, xp.inf], dtype=dtype)[None, :]
      return xp.nextafter(a, b)
  
file_path: cupy/tests/cupy_tests/math_tests/test_floating.py
imports: import unittest
  import numpy
  import cupy
  from cupy import testing
label_desc: Use image node_id 7 for calling the TestFloating obj's underlying member method code with example usage: obj.test_nextafter_float(xp, dtype) and returns: xp