code: def test_dtype(self):
      link = self.l
      # Check the dtype of batch normalization layers.
      assert link.proj3n.beta.dtype == self.dtype
      assert link.conv3n.beta.dtype == self.dtype
      assert link.proj33n.beta.dtype == self.dtype
      assert link.conv33an.beta.dtype == self.dtype
      assert link.conv33bn.beta.dtype == self.dtype
      assert link.conv1n.beta.dtype == self.dtype
      assert link.poolpn.beta.dtype == self.dtype
  
imports: import unittest
  import numpy
  import chainer
  from chainer import backend
  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 TestInceptionBnDtype obj's underlying member method code with example usage: obj.test_dtype() without return types