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TypeScript

/**
* Callback called on frame rendered
* @argument time Time of the current frame in milliseconds
*/
export interface FrameRequestCallback {
(time: number): void;
}
/**
* Requests an animation frame and returns the timer ID
* @param cb Callback to be called on frame
*/
export function requestAnimationFrame(cb: FrameRequestCallback): number;
/**
* Cancels a previously scheduled animation frame request
* @param id timer ID to cancel
*/
export function cancelAnimationFrame(id: number): void;