type Task<T> = (...args: any[]) => T | Promise<T>;
/**
 * promiseQueue is a function that returns an object with two methods: add and flush.
 * add takes a function that will be added to the queue and returns a promise that resolves to the function's return value when it is called and executed in order of addition to the queue.
 * flush takes an error and rejects all pending promises with that error.
 * @returns object with add and flush methods
 * @example
 * const queue = promiseQueue()
 * const promise1 = queue.add(() => 1)
 * const promise2 = queue.add(() => 2)
 * promise1.then(value => console.log(value)) // 1
 * promise2.then(value => console.log(value)) // 2
 */
export default function promiseQueue(): {
    add<T>(task: Task<T>): Promise<T>;
    flush(reason: string | Error): void;
};
export {};
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