question: public Predictor ( InputStream in ) throws IOException { ModelReader reader = new ModelReader ( in ) ; mparam = new ModelParam ( reader ) ; name_obj = reader . readString ( ) ; name_gbm = reader . readString ( ) ; initObjGbm ( ) ; gbm . loadModel ( reader , mparam . saved_with_pbuffer != 0 ) ; }
target:  Instantiates with the Xgboost model