import { conversion, Req } from "@huz-com/types";
import { AbstractSingularAsync } from "../abstract/AbstractSingularAsync";
declare type R = boolean;
declare type ANY = R | Array<R> | Record<string, R>;
export declare class CallbackExists extends AbstractSingularAsync<ANY> {
    private static _ins;
    static ins(): CallbackExists;
    constructor();
    runAsync<T extends ANY = R>(clazz: string, value: unknown, opt?: conversion.CastBase, req?: Req): Promise<T>;
}
export {};