def _DecoderParams(self):
    p = decoder.MTDecoderV1.Params()
    p.name = 'decoder'
    p.source_dim = 4
    p.emb.vocab_size = 32000
    p.emb.embedding_dim = 4
    p.emb.max_num_shards = 1
    p.rnn_cell_dim = 4
    p.rnn_layers = 3
    p.attention.hidden_dim = 2
    p.softmax.num_classes = 32000
    p.softmax.num_shards = 1
    return p