bilm/model/dump_token_embeddings is not useful for the token format imput?

i find the bilm/model/dump_token_embeddings is not useful for the token format imput?
cause the char_cnn is not accessible to the token format input while dumping token embeddings

def dump_token_embeddings(vocab_file, options_file, weight_file, outfile):
'''
Given an input vocabulary file, dump all the token embeddings to the
outfile. The result can be used as the embedding_weight_file when
constructing a BidirectionalLanguageModel.
'''
with open(options_file, 'r') as fin:
options = json.load(fin)
max_word_length = options['char_cnn']['max_characters_per_token']

vocab = UnicodeCharsVocabulary(vocab_file, max_word_length)
batcher = Batcher(vocab_file, max_word_length)