to_ndarray()
bin_by_splits()
feature_splits()
iter_df()
split_target()
save_json()
read_json()
clip()
flatten_columns()
bin_to_number()
generate_target()
get_dummies()
derivative()
Decorator
Decorator.__init__()
frame_exclude
select_dtypes
save_to_json
load_from_json
support_dataframe
proxy_docstring
support_numpy
xgb_loss
performance