import DevicePixelRatioObserver from '../devicepixelratioobserver/DevicePixelRatioObserver' ; /**
 * [[DevicePixelRatioMonitor]] manages device pixel ratio observers.
 */ export default interface DevicePixelRatioMonitor { /**
     * Registers a device pixel ratio observer to the observer queue.
     */ registerObserver ( observer ) : void ; /**
     * Removes a device pixel ratio observer from the observer queue.
     */ removeObserver ( observer ) : void ; }