code: def forward(self, inputs, devices):
      c, x, y = inputs
      z = functions.where(c, x, y)
      return (z,)
  
file_path: chainer/tests/chainer_tests/functions_tests/array_tests/test_where.py
imports: import unittest
  import numpy
  import pytest
  import chainer
  from chainer import functions
  from chainer import testing
  from chainer.utils import type_check
label_desc: Use image node_id 4 for calling the TestWhere obj's underlying member method code with example usage: obj.forward(inputs, devices) and returns: z