class SignatureClipper {

    public static void clipSignatures(Collection<PDAnnotation> annotations) {
        if (nonNull(annotations)) {
            for (PDAnnotation annotation : annotations) {
                if (COSName.WIDGET.getName().equals(annotation.getSubtype())
                        && COSName.SIG.equals(annotation.getCOSObject().getCOSName(COSName.FT))) {
                    clipSignature(annotation.getCOSObject());
                }
            }
        }
    }

    private  SignatureClipper();

}