export declare const getMimeStructure: (file: File) => {
    type: string;
    subtype: string;
};
export declare const validateMimeType: (file: File, mimes: string[]) => boolean;
export declare const fileToImage: (file: File) => Promise<HTMLImageElement>;
export declare const fileToAudio: (file: File) => Promise<HTMLAudioElement>;
export declare const fileToVideo: (file: File) => Promise<HTMLVideoElement>;
export declare const isObjectRule: (rule: any) => boolean;