class BrokerInterceptor implements Interceptor {

    @Override
    public void notifyClientDisconnected(final String clientID, final String username) {
        for (final InterceptHandler handler : this.handlers.get(InterceptDisconnectMessage.class)) {
            LOG.debug("Notifying MQTT client disconnection to interceptor. CId={}, username={}, interceptorId={}",
                clientID, username, handler.getID());
            executor.execute(() -> handler.onDisconnect(new InterceptDisconnectMessage(clientID, username)));
        }
    }

    private  BrokerInterceptor(int poolSize, List<InterceptHandler> handlers);
      BrokerInterceptor(List<InterceptHandler> handlers);
      BrokerInterceptor(IConfig props, List<InterceptHandler> handlers);

}