SVGMarkerElement: {
    SVG_MARKERUNITS_STROKEWIDTH: number;
    SVG_MARKERUNITS_UNKNOWN: number;
    SVG_MARKERUNITS_USERSPACEONUSE: number;
    SVG_MARKER_ORIENT_ANGLE: number;
    SVG_MARKER_ORIENT_AUTO: number;
    SVG_MARKER_ORIENT_UNKNOWN: number;
    prototype: SVGMarkerElement;
    new (): SVGMarkerElement;
}