code: public void setB2buaHelper(MobicentsB2BUAHelper helperImpl) {
              logger.debug("setting B2BUAHelper");
              SipApplicationSession applicationSession = getApplicationSession();
              if (this.isValid && applicationSession.isValid()) {
                  applicationSession.setAttribute(B2buaHelperImpl.B2BUA_ATT_NAME, helperImpl);
                  logger.debug("B2BUAHelper set");
              }
  	}
docs: {@inheritDoc}