code: def test_output_is_half(self):
      out_tensor = self.fp16_model(self.in_tensor)
      assert out_tensor.dtype == torch.half
  
imports: import unittest
  import torch
  import torch.nn
  from apex.fp16_utils import FP16Model
label_desc: Use image node_id 3 for calling the TestFP16Model obj's underlying member method code with example usage: obj.test_output_is_half() without return types