export declare class AnnotationProperty {
    /**
     * Viewport width.
     */
    viewportWidth?: number;
    /**
     * Viewport height.
     */
    viewportHeight?: number;
    /**
     * Screen width.
     */
    screenWidth?: number;
    /**
     * Screen height.
     */
    screenHeight?: number;
    /**
     * Screen scroll height.
     */
    screenScrollHeight?: number;
    /**
     * Length of the arrow.
     */
    arrowLength?: number;
    /**
     * Angle of the arrow.
     */
    arrowAngle?: number;
}