* @return
*/
private List<Integer> findInTicketMap(Collaborator collaborator, WorkType workType) {
log.debug("findInTicketMap: " + collaborator + ", " + workType);
SimplePair findPair = new SimplePair(collaborator.getId(), workType.getId());
List<Integer> list = ticketMap.get(findPair);
if (list == null) {
list = new Vector<Integer>();
ticketMap.put(findPair, list);
}