export declare function getFiles(dir: string): string[];
export declare function sleep(ms: number): Promise<unknown>;
export declare function waitFor(cb: (resolve: (value?: any) => void, reject: (reason?: any) => void) => void, withTimeout: number, onTimeout: () => Promise<void>): Promise<unknown>;
export declare function serialize(obj?: {}, fmt?: string | number): string;
export declare function uuidFrom(string: string): string;
export declare function nextUUID(): string;
export declare const isDebug: boolean | undefined;