code: def make_params_not_shared(a):
      """Make a link's params not shared.
  
      Args:
        a (chainer.Link): link whose params are to be made not shared
      """
      assert isinstance(a, chainer.Link)
      for param in a.params():
          param.array = param.array.copy()
  
imports: import multiprocessing
  import warnings
  import chainer
  import numpy
  import chainerrl
  from chainerrl.misc import random_seed
label_desc: Use image node_id 4 for calling a global function with example usage: make_params_not_shared(a) without return types