export declare class Utils {
    static getNameWithoutExt(filename: string): string;
    static getExt(name: string): string;
    static getFreeFileName(dir: string, defaultName: string, alwaysWithIndex: boolean): string;
    static readonly PROHIBITED_SYMBOLS = "/\\?%*:|\"<>";
    static fixFileName(name: string): string;
    static isFileNameSyntaxOk(name: string): boolean;
    static isImage(name: string): boolean;
}