code: def test_gpu_forward(self):
      for recompute_granularity in (None, "selective"):
          for use_transformer_engine in (True, False):
              self.run_gpu_forward(
                  recompute_granularity, use_transformer_engine
              )
  
file_path: megatron-lm/tests/unit_tests/transformer/test_retro_attention.py
imports: import torch
  import types
  from megatron.core.models.retro import RetroConfig, get_retro_decoder_block_spec
  from megatron.core.models.retro.decoder_attention import RetroDecoderCrossAttention, RetroDecoderBiasDropoutAdd
  from megatron.core.models.retro.encoder_attention import RetroEncoderCrossAttention, RetroEncoderBiasDropoutAdd, RetroEncoderLayerNorm
  from megatron.core.tensor_parallel.random import model_parallel_cuda_manual_seed
  from megatron.core.transformer.transformer_block import TransformerBlock
  from tests.unit_tests.test_utilities import Utils
label_desc: Use image node_id 8 for calling the TestRetroAttention obj's underlying member method code with example usage: obj.test_gpu_forward() without return types