type AnswerCallback<Result, Arguments extends any[] = []> = (result: Result, ...args: Arguments) => Result;
interface IQuestionAsker<Result = any, Arguments extends any[] = []> {
    ask(result: Result, ...args: Arguments): Result;
}
interface IQuestion<Result = any, Arguments extends any[] = []> extends IQuestionAsker<Result, Arguments> {
    addAnswer(callback: AnswerCallback<Result, Arguments>): void;
    removeAnswer(callback: AnswerCallback<Result, Arguments>): void;
    addOneTimeAnswer(callback: AnswerCallback<Result, Arguments>): void;
}
declare class Question<Result = any, Arguments extends any[] = []> implements IQuestion<Result, Arguments> {
    protected _callbacks: AnswerCallback<Result, Arguments>[];
    protected _callbacksSet: Set<AnswerCallback<Result, Arguments>>;
    addAnswer(callback: AnswerCallback<Result, Arguments>): void;
    removeAnswer(callback: AnswerCallback<Result, Arguments>): void;
    addOneTimeAnswer(callback: AnswerCallback<Result, Arguments>): void;
    ask(result: Result, ...args: Arguments): Result;
}

export { type AnswerCallback, type IQuestion, type IQuestionAsker, Question };