public boolean hasExtension(String extension) {
   return _SVGTests.hasExtension(extension);
 }
 public SVGStringList getRequiredExtensions() {
   return _SVGTests.getRequiredExtensions();
 }
 public SVGStringList getSystemLanguage() {
   return _SVGTests.getSystemLanguage();
 }
 public SVGStringList getRequiredFeatures() {
   return _SVGTests.getRequiredFeatures();
 }