def METHOD_NAME(
    self,
    src_tokens,
    src_lengths,
    prev_output_tokens,
    return_all_hiddens: bool = True,
    features_only: bool = False,
    alignment_layer: Optional[int] = None,
    alignment_heads: Optional[int] = None,
):
    """
    Run the forward pass for an encoder-decoder model.
    Copied from the base class, but without ``**kwargs``,
    which are not supported by TorchScript.
    """
    encoder_out = self.encoder(
        src_tokens, src_lengths=src_lengths, return_all_hiddens=return_all_hiddens
    )
    decoder_out = self.decoder(
        prev_output_tokens,
        encoder_out=encoder_out,
        features_only=features_only,
        alignment_layer=alignment_layer,
        alignment_heads=alignment_heads,
        src_lengths=src_lengths,
        return_all_hiddens=return_all_hiddens,
    )
    return decoder_out