Can’t latch onto lifecycle

[svarughese91]

I am trying to access the watcher of the exit stationary region but it says any of the functions I try to access done exist.
this.backgroundGeolocation.on('stationary', (stationaryLocation) => { // handle stationary locations here });
When i try to do the above i get the error: Property 'on' does not exist on type 'BackgroundGeolocation'.

Your Environment

Plugin version: 2.3.3
Platform: iOS
OS version: iOS 11
Device manufacturer and model: iPhone 7
Cordova version (cordova -v):8.0.0
Cordova platform version (cordova platform ls):4.5.4
Plugin configuration options:
desiredAccuracy: 10, stationaryRadius: 5, distanceFilter: 5, interval: 2000, httpHeaders: { 'Content-Type': 'application/json', 'Authorization': getAuthToken() }, url: this.updateLocURL, debug: true, // enable this hear sounds for background-geolocation life-cycle. stopOnTerminate: false, // enable this to clear background location settings when the app terminates