code: def create_link(self, initializers):
      initial_gamma, initial_beta = initializers
      with chainer.using_config("dtype", self.dtype):
          link = links.GroupNormalization(
              self.groups,
              initial_gamma=initial_gamma,
              initial_beta=initial_beta,
          )
      return link
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import links
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the GroupNormalizationTest obj's underlying member method code with example usage: obj.create_link(initializers) and returns: link