How to use the @iobroker/adapter-react/Connection.PROGRESS.CONNECTING function in @iobroker/adapter-react

onProgress: progress => {
                if (progress === PROGRESS.CONNECTING) {
                    this.setState({connected: false});
                } else if (progress === PROGRESS.READY) {
                    this.setState({connected: true, progress: 100});
                } else {
                    this.setState({connected: true, progress: Math.round(PROGRESS.READY / progress * 100)});
                }
            },
            onReady: (objects, scripts) => {