TypeError: __init__() got an unexpected keyword argument 'feature_names'

I am trying to run query autocomplete. Unable to run the line

args = DetextArg(ftr_ext="cnn", num_filters=50, num_units=64, emb_sim_func=["inner"], # cosine matching function ltr_loss_fn="softmax", # learning-to-rank loss optimizer="bert_adam", # same AdamWeightDecay optimizer as in BERT training learning_rate=0.002, max_len=16, min_len=3, use_deep=True, num_train_steps=300, steps_per_stats=30, steps_per_eval=30, train_batch_size=64, test_batch_size=64, pmetric="mrr@5", vocab_file=vocab_file, feature_names=["label","usr_prefix","doc_suffix"], train_file="train.tfrecord", dev_file="dev.tfrecord", test_file="test.tfrecord", out_dir="output")

Start by reproducing the exact query-autocomplete call to DetextArg and inspect its constructor to determine which arguments it accepts. Compare that interface with the shown feature_names argument; done means the reported TypeError is resolved for this invocation and the query-autocomplete path runs successfully.