def prune_transformer(model, amount=0.3):
            for name, module in model.named_modules():
                if isinstance(module, torch.nn.Linear):
                    prune.l1_unstructured(module, name='weight', amount=amount)
                    prune.remove(module, 'weight')
            return model

        # Efficient Multilingual NMT
        class LightTranslator(nn.Module):
            def __init__(self, vocab_size, d_model=512):
                super().__init__()
                self.encoder = TransformerEncoder(d_model)
                self.decoder = TransformerDecoder(d_model)

            def forward(self, src, tgt):
                memory = self.encoder(src)
                return self.decoder(tgt, memory)