/**
 * https://dev.to/bwca/create-a-debounce-function-from-scratch-in-typescript-560m
 * @param fn Accepted argument and return, a function.
 * @param ms The delay time.
 * @returns a debounced function that resolves to a value after certain amount of time. Or never resolves if terminated.
 */
export declare function debounce<A = unknown, R = void>(fn: (args: A) => R, ms: number): [(args: A) => Promise<R>, () => void];