declare class FormData {
    datas: {};
    readonly id: string;
    append(key: string, val: any): void;
    delete(key: string): void;
    get(key: string): any;
    set(key: string, val: any): void;
    getAll(key: string): any;
    values(): unknown[];
    keys(): string[];
    entries(): [string, unknown][];
}
export default FormData;