code: public boolean remove (int[] values)
      {
          boolean modified = false;
          int vcount = values.length;
          for (int i = 0; i < vcount; i++) {
              modified = (remove(values[i]) || modified);
          }
          return modified;
      }
docs: Removes all values in the supplied array from the set. Any values that are in the array but
  not in the set are simply ignored.
  
  @param values elements to be removed from the set.
  
  @return <tt>true</tt> if this set contained any of the specified elements (which will have
  been removed).