code: def decode_sequence(self,
                          source_encoded: mx.sym.Symbol,
                          source_encoded_lengths: mx.sym.Symbol,
                          source_encoded_max_length: int,
                          target_embed: mx.sym.Symbol,
                          target_embed_lengths: mx.sym.Symbol,
                          target_embed_max_length: int) -> mx.sym.Symbol:
          
          pass
docs: Decodes a sequence of embedded target words and returns sequence of last decoder
          representations for each time step.
  
          :param source_encoded: Encoded source: (batch_size, source_encoded_max_length, encoder_depth).
          :param source_encoded_lengths: Lengths of encoded source sequences. Shape: (batch_size,).
          :param source_encoded_max_length: Size of encoder time dimension.
          :param target_embed: Embedded target sequence. Shape: (batch_size, target_embed_max_length, target_num_embed).
          :param target_embed_lengths: Lengths of embedded target sequences. Shape: (batch_size,).
          :param target_embed_max_length: Dimension of the embedded target sequence.
          :return: Decoder data. Shape: (batch_size, target_embed_max_length, decoder_depth).