code: public MobicentsSipApplicationSession findSipApplicationSession(HttpSession httpSession) {
  		for (MobicentsSipApplicationSession sipApplicationSessionImpl : sipApplicationSessions.values()) {			
  			if(sipApplicationSessionImpl.findHttpSession(httpSession.getId()) != null) {
  				return sipApplicationSessionImpl;
  			}
  		}
  		return null;
  	}
docs: Retrieves the sip application session holding the converged http session in parameter
  @param convergedHttpSession the converged session to look up
  @return the sip application session holding a reference to it or null if none references it