declare const _default: import('vue').DefineComponent<{
    useful: {
        type: BooleanConstructor;
        default: boolean;
    };
}, {}, unknown, {}, {}, import('vue').ComponentOptionsMixin, import('vue').ComponentOptionsMixin, {}, string, import('vue').PublicProps, Readonly<import('vue').ExtractPropTypes<{
    useful: {
        type: BooleanConstructor;
        default: boolean;
    };
}>>, {
    useful: boolean;
}, {}>;
export default _default;