def override_config(args):
            """
            vggtrasformer_base use 12 layers of transformer,
            for testing purpose, it is too expensive. For fast turn-around
            test, reduce the number of layers to 3.
            """
            args.transformer_enc_config = (
                "((512, 8, 2048, True, 0.15, 0.15, 0.15),) * 3"
            )

            vggtrasformer_base use 12 layers of transformer,
            for testing purpose, it is too expensive. For fast turn-around
            test, reduce the number of layers to 3.
            
decoding/IAD/fairseq/tests/speech_recognition/test_vggtransformer.py