/**
 * https://stackoverflow.com/a/3368118
 * Draws a rounded rectangle using the current state of the canvas.
 * @param {CanvasRenderingContext2D} context
 * @param {Number} x The top left x coordinate
 * @param {Number} y The top left y coordinate
 * @param {Number} width The width of the rectangle
 * @param {Number} height The height of the rectangle
 * @param {Number} radius The corner radius
 */
export declare const roundRect: (context: CanvasRenderingContext2D, x: number, y: number, width: number, height: number, radius: number, strokeColor?: string) => void;