code: def forward_xp(self, inputs, xp):
      (x,) = inputs
      y = x[self.indices]
      return (y,)
  
imports: import unittest
  import numpy
  import pytest
  import chainer.testing
  import chainerx
  import chainerx.testing
  from chainerx_tests import array_utils
  from chainerx_tests import dtype_utils
  from chainerx_tests import math_utils
  from chainerx_tests import op_utils
label_desc: Use image node_id 2 for calling the TestGetitem obj's underlying member method code with example usage: obj.forward_xp(inputs, xp) and returns: y