Write a method in the HashIntSet class called addAll that accepts another hash set as a parameter and adds all of the elements from the other set into the current set. For example, if the set stores [-5, 1, 2, 3] and the method is passed [2, 3, 6, 44, 79], your set would store [-5, 1, 2, 3, 6, 44, 79].