code: def _get_gufunc(self, signature):
      def func(x):
          return x
  
      return _GUFunc(func, signature)
  
imports: import numpy
  import pytest
  import cupy
  from cupy import testing
  from cupy._core._gufuncs import _GUFunc
label_desc: Use image node_id 1 for calling the TestGUFuncAxes obj's underlying member method code with example usage: obj._get_gufunc(signature) and returns: _GUFunc, x