import { Subject } from 'rxjs';
import * as i0 from "@angular/core";
export declare class ThemeService {
    private document;
    storageSrv: Storage;
    change$: Subject<void>;
    apply(): void;
    switch(options?: {
        noEmit: boolean;
        noSave: boolean;
    }): void;
    get isDark(): boolean;
    static ɵfac: i0.ɵɵFactoryDeclaration<ThemeService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ThemeService>;
}