SVGFEDisplacementMapElement: {
    SVG_CHANNEL_A: number;
    SVG_CHANNEL_B: number;
    SVG_CHANNEL_G: number;
    SVG_CHANNEL_R: number;
    SVG_CHANNEL_UNKNOWN: number;
    prototype: SVGFEDisplacementMapElement;
    new (): SVGFEDisplacementMapElement;
}