code: def setUp(self):
      self.check_backward_options.update({"atol": 1e-3, "rtol": 1e-2})
      self.check_double_backward_options.update(
          {"atol": 1e-3, "rtol": 1e-2}
      )
  
file_path: chainer/tests/chainer_tests/functions_tests/math_tests/test_exponential_m1.py
imports: import numpy
  from chainer import functions
  from chainer import testing
  from chainer import utils
label_desc: Use image node_id 1 for calling the Expm1FunctionTest obj's underlying member method code with example usage: obj.setUp() without return types