code: def forward(self, inputs, device):
      x, W = inputs
      out = chainer.functions.embed_id(x, W, self.ignore_label)
      return (out,)
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer.functions.connection import embed_id
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import backend
label_desc: Use image node_id 3 for calling the TestEmbedID obj's underlying member method code with example usage: obj.forward(inputs, device) and returns: out