code: def forward_xp(self, inputs, xp):
      a, b = inputs
      cmp_op = _cmp_funcs[self.cmp_func]
      module_func = getattr(xp, self.cmp_func)
  
      y1 = cmp_op(a, b)
      y2 = cmp_op(b, a)
      y3 = module_func(a, b)
      y4 = module_func(b, a)
      return y1, y2, y3, y4
  
imports: import chainer
  import numpy
  import pytest
  import chainerx
  import chainerx.testing
  from chainerx_tests import array_utils
  from chainerx_tests import dtype_utils
  from chainerx_tests import op_utils
label_desc: Use image node_id 2 for calling the TestCmp obj's underlying member method code with example usage: obj.forward_xp(inputs, xp) and returns: y1,  y2,  y3,  y4