code: def forward_expected(self, inputs):
      x1, x2 = inputs
      expected = numpy.copy(x1)
      for i, j, k in numpy.ndindex(expected.shape):
          expected[i, j, k] += x2[j]
      expected = utils.force_array(expected)
      return (expected,)
  
file_path: chainer/tests/chainer_tests/functions_tests/math_tests/test_bias.py
imports: import unittest
  import numpy
  import chainer
  from chainer import functions
  from chainer import testing
  from chainer import utils
label_desc: Use image node_id 3 for calling the TestBias obj's underlying member method code with example usage: obj.forward_expected(inputs) and returns: expected