code: def forward_chainerx(self, inputs):
      c, x = inputs
      c, h = chainerx.lstm(c, x)
      return (
          c,
          h,
      )
  
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 TestLstm obj's underlying member method code with example usage: obj.forward_chainerx(inputs) and returns: c,  h