code: def setUp(self):
      self.check_forward_options.update({"rtol": 1e-2, "atol": 1e-2})
      self.check_backward_options.update({"rtol": 1e-2, "atol": 1e-2})
      self.check_double_backward_options.update(
          {"rtol": 5e-3, "atol": 5e-2}
      )
      self.skip_double_backward_test = True
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  import chainer.functions
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import backend
  from chainer.testing import condition
label_desc: Use image node_id 1 for calling the TestNStepBiLSTM obj's underlying member method code with example usage: obj.setUp() without return types