import { IonicApp } from '../components/app/app-root';
export declare class FeatureDetect {
    private _r;
    test(appRoot: IonicApp): void;
    has(featureName: string): boolean;
    static add(name: string, test: any): void;
}
export declare abstract class FeatureDetectTest {
    abstract test(): boolean;
}
export declare class BackdropFilterTest implements FeatureDetectTest {
    test(): boolean;
}
