code: def weight_decay_is_fused(self):
      return False
  
imports: from six import iteritems
  import nnabla
  import nnabla.solvers
  from nnabla.testing import assert_allclose
  import numpy
  from collections import OrderedDict
  import os
label_desc: Use image node_id 4 for calling the RefSolver obj's underlying member method code with example usage: obj.weight_decay_is_fused() and returns: False