code: def forward_chainerx(self, inputs):
      return self.forward_xp(inputs, chainerx)
  
file_path: chainer/tests/chainerx_tests/unit_tests/routines_tests/test_evaluation.py
imports: import chainer
  from chainer import functions
  import numpy
  import pytest
  import chainerx
  from chainerx_tests import array_utils
  from chainerx_tests import op_utils
label_desc: Use image node_id 2 for calling the EvalBase obj's underlying member method code with example usage: obj.forward_chainerx(inputs) and returns: self