code: def setUp(self):
      self.lowprec_dtype = chainer.get_dtype(self.dtype)
      highprec_dtype = chainer.get_dtype(
          self.dtype, map_mixed16=numpy.float32
      )
  
      self.initial_gamma = numpy.random.uniform(-1, 1, self.size)
      self.initial_gamma = self.initial_gamma.astype(highprec_dtype)
      self.initial_beta = numpy.random.uniform(-1, 1, self.size)
      self.initial_beta = self.initial_beta.astype(highprec_dtype)
      self.link = links.GroupNormalization(
          self.groups,
          initial_gamma=self.initial_gamma,
          initial_beta=self.initial_beta,
      )
      self.shape = (1, self.size, 1)
  
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 1 for calling the TestInitialize obj's underlying member method code with example usage: obj.setUp() without return types