code: public final void removeEntries(Iterator<Entry<?>> entries) {
          if (entries != null) {
              while (entries.hasNext()) {
                  removeEntry(entries.next());
              }
          }
      }
docs: Removes the entries returned by the iterator from the calendar. This is basically just a convenience
  method as the actual work of removing an entry from a calendar is done inside {@link Entry#setCalendar(Calendar)}.
  
  @param entries the entries to remove