/**
 * Allows you to capture the frames-per-second metrics of your application. 
 * @module "fps-meter"
 */ /** */

/**
* Starts the frames-per-second meter.
*/
export function start(): void;

/**
* Stops the frames-per-second meter.
*/
export function stop(): void;

/**
* Returns a valid indicating whether the frames-per-second meter is currently running.
*/
export function running(): boolean;

/**
* Adds a callback function to be called each time FPS data is due to be reported. Returns an unique id which can be used to remove this callback later.
*/
export function addCallback(callback: (fps: number, minFps?: number) => void): number;

/**
* Removes the callback with the specified id.
*/
export function removeCallback(id: number);
