src/main/java/org/java_websocket/AbstractWebSocket.java
protected void startConnectionLostTimer() {
        synchronized (syncConnectionLost) {
            if (this.connectionLostTimeout <= 0) {
                log.trace("Connection lost timer deactivated");
                return;
            }
            log.trace("Connection lost timer started");
            this.websocketRunning = true;
            restartConnectionLostTimer();
        }
    }
protected void startConnectionLostTimer() {
        synchronized (syncConnectionLost) {
            if (this.connectionLostTimeout <= 0) {
                log.trace("Connection lost timer deactivated");
                return;
            }
            log.trace("Connection lost timer started");
            this.websocketRunning = true;
            restartConnectionLostTimer();
        }
    }
Start the connection lost timer
@since 1.3.4