question: public void addEntry ( double start , int from , int via , int to , double duration ) { List < ScheduleEntry > list = schedules . get ( from ) ; if ( list == null ) { list = new ArrayList < ScheduleEntry > ( ) ; schedules . put ( from , list ) ; } list . add ( new ScheduleEntry ( start , from , via , to , duration ) ) ; }
target:  Adds a new schedule entry to the oracle