code: def _adjust_params(self):
      # Adjusts parameters, e.g. fill the default values
      if self.use_cuda:
          if self.cuda_device is None:
              self.cuda_device = 0
  
imports: import functools
  import chainer
  from chainer import backend
  from chainer.testing import _bundle
  from chainer.testing import attr
  import chainerx
label_desc: Use image node_id 3 for calling the BackendConfig obj's underlying member method code with example usage: obj._adjust_params() without return types