code: def setUp(self):
      if self.dtype == numpy.float16:
          self.check_forward_options.update(
              {"atol": 5e-3, "rtol": 1e-2}
          )
          self.check_backward_options.update(
              {"atol": 5e-3, "rtol": 1e-2}
          )
          self.check_double_backward_options.update(
              {"atol": 5e-3, "rtol": 1e-2}
          )
  
imports: import numpy
  import six
  import chainer
  from chainer.functions.normalization import batch_renormalization
  from chainer import testing
  import chainerx
label_desc: Use image node_id 1 for calling the TestFixedBatchRenormalization obj's underlying member method code with example usage: obj.setUp() without return types