export interface ConicalGradient {
    addColorStop(pos: number, color: string): void;
    readonly pattern: CanvasPattern;
    readonly stops: [pos: number, color: string][];
}
declare global {
    interface CanvasRenderingContext2D {
        /**
         * @param ox The x-axis coordinate of the origin of the gradient pattern, which default value is `0`.
         * @param oy The y-axis coordinate of the origin of the gradient pattern, which default value is `0`.
         * @param startAngle The angle at which the arc starts in radians measured from the positive x-axis, which default
         *                   value is `0`.
         * @param endAngle The angle at which the arc ends in radians measured from the positive x-axis, which default value
         *                 is `2 * Math.PI`.
         * @param anticlockwise An optional `Boolean`. If `true`, draws the gradient counter-clockwise between the start and
         *                      end angles. The default is `false` (clockwise).
         */
        createConicalGradient(ox?: number, oy?: number, startAngle?: number, endAngle?: number, anticlockwise?: boolean): ConicalGradient;
    }
}