docs: public void disconnectAllSessions() {
  
          List<JingleSession> sessions = jingleSessions.subList(0, jingleSessions.size());
  
          for (JingleSession jingleSession : sessions)
              try {
                  jingleSession.terminate();
              } catch (Exception e) {
                  LOGGER.log(Level.WARNING, "exception", e);
              }
  
          sessions.clear();
      }