import * as i0 from "@angular/core";
export declare class SdSystemConfigProvider<T> {
    private readonly _sdLocalStorage;
    fn?: {
        set<K extends keyof T & string>(key: K, data: T[K]): Promise<void> | void;
        get(key: keyof T & string): PromiseLike<any>;
    };
    setAsync<K extends keyof T & string>(key: K, data: T[K]): Promise<void>;
    getAsync(key: keyof T & string): Promise<any>;
    static ɵfac: i0.ɵɵFactoryDeclaration<SdSystemConfigProvider<any>, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SdSystemConfigProvider<any>>;
}