export declare class CommonService {
    static timeout(ms: number): Promise<unknown>;
    static sleep(fn: any, ms: number, ...args: any[]): Promise<any>;
    static isNull(x: any): boolean;
    static newElement<T extends HTMLElement>(doc: Document, type: string, className: string, innerText?: string | undefined): T;
}
export declare abstract class CommonComponentService {
    currentTheme: string;
    static themeString: string | 'dark' | 'dracula' | 'light';
    constructor();
    static UpdateTheme(theme: string | 'dark' | 'dracula' | 'light'): void;
}