code: def forward_chainerx(self, inputs):
      if len(inputs) == 3:
          x, w, b = inputs
      else:
          (x, w), b = inputs, None
  
      n_batch_axes = self.n_batch_axes
  
      if b is Unspecified:
          y = chainerx.linear(x, w)
      elif n_batch_axes is Unspecified:
          y = chainerx.linear(x, w, b)
      else:
          y = chainerx.linear(x, w, b, n_batch_axes)
      return (y,)
  
imports: import unittest
  import chainer
  from chainer import functions
  import numpy
  import pytest
  import chainerx
  from chainerx_tests import array_utils
  from chainerx_tests import dtype_utils
  from chainerx_tests import op_utils
label_desc: Use image node_id 3 for calling the TestLinear obj's underlying member method code with example usage: obj.forward_chainerx(inputs) and returns: y