NMT/src/test.py (2 lines):
	- line 23: # TODO: make a better hash function (although this is good enough for embeddings)
	- line 33: if not params.attention:  # TODO: implement this for seq2seq model


NMT/src/model/__init__.py (2 lines):
	- line 51: assert params.lm_share_enc <= 1 and params.lm_share_dec <= 1  # TODO: support more than one layer
	- line 52: assert params.input_feeding is False or params.lm_share_dec == 0  # TODO: support input feeding mode


NMT/src/model/transformer.py (1 line):
	- line 141: self.vocab_mask_neg = args.vocab_mask_neg if len(args.vocab) > 0 else None  # TODO: implement