code: def test_specified_mixed16_dtype(self):
      with chainer.using_config("dtype", numpy.float64):
          self.assertEqual(
              chainer.get_dtype(chainer.mixed16),
              numpy.dtype(numpy.float16),
          )
          self.assertEqual(
              chainer.get_dtype(
                  chainer.mixed16, map_mixed16=numpy.float32
              ),
              numpy.dtype(numpy.float32),
          )
  
file_path: chainer/tests/chainer_tests/test_init.py
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 4 for calling the TestDtype obj's underlying member method code with example usage: obj.test_specified_mixed16_dtype() without return types