export declare const OnFuncReturn: {
    readonly UNREGISTER: symbol;
    readonly ONCE: symbol;
};
export type OnFuncReturn = (typeof OnFuncReturn)[keyof typeof OnFuncReturn];
export interface ReturnOnFunc<Args extends any[], X = unknown, Y = unknown> {
    (fn: (...a: Args) => OnFuncReturn | X): () => unknown;
    invoke(...a: Args): void;
    invokeAsync(...a: Args): Promise<void>;
    clear(): void;
    once(fn: (...a: Args) => void): () => unknown;
    onRegister(fn: (fn0: (...a: Args) => unknown, fns: ((...a: Args) => unknown)[]) => OnFuncReturn | Y): () => unknown;
}
type ExtractArgs<T, X> = T extends (...args: infer A) => OnFuncReturn | X ? A : never;
export declare function OnFunc<Fn extends (...args: any[]) => OnFuncReturn | X, X = unknown>(): ReturnOnFunc<ExtractArgs<Fn, X>>;
export {};
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