JSValue JSC_HOST_CALL jsSVGSVGElementPrototypeFunctionHasExtension(ExecState* exec, JSObject*, JSValue thisValue, const ArgList& args) { UNUSED_PARAM(args); if (!thisValue.isObject(&JSSVGSVGElement::s_info)) return throwError(exec, TypeError); JSSVGSVGElement* castedThisObj = static_cast<JSSVGSVGElement*>(asObject(thisValue)); SVGSVGElement* imp = static_cast<SVGSVGElement*>(castedThisObj->impl()); const UString& extension = args.at(0).toString(exec); JSC::JSValue result = jsBoolean(imp->hasExtension(extension)); return result; }