public String toAbsoluteCoordinates() {
        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append(x);
        stringBuilder.append(",");
        stringBuilder.append(y);
        return stringBuilder.toString();
    }
Represent a point as it would be in the generated SVG document.
signature-pad/src/main/java/com/github/gcacace/signaturepad/utils/SvgPoint.java