code: def _unwrap_variable(x):
      if isinstance(x, chainer.Variable):
          return x.array
      else:
          return x
  
imports: import chainer
  from chainer import cuda
  import chainer.functions
  import chainer.links
  from chainerrl.action_value import QuantileDiscreteActionValue
  from chainerrl.agents import dqn
  from chainerrl.links import StatelessRecurrentChainList
label_desc: Use image node_id 3 for calling a global function with example usage: _unwrap_variable(x) and returns: x, x