export declare class WidgetThemeService {
    private themes;
    private _obs;
    private observer;
    private active_theme;
    private listener_timer;
    constructor();
    newTheme(theme: string, components: any): boolean;
    updateTheme(theme: string, components: any): boolean;
    addThemeComponents(theme: string, components: any): void;
    setTheme(theme: string): void;
    readonly theme: string;
    listener(): any;
}