var scope: ClassLoaderScope? = null

        @get:Synchronized
        override val program: Class<*>
            get() {
                if (loadedClass == null) {
                    scope = prepareClassLoaderScope().also {
                        loadedClass = it.localClassLoader.loadClass(className)
                    }
                }
                return loadedClass!!
            }

        @Synchronized

                if (isEmpty && !hasMethods) {
                    throw new UnsupportedOperationException("Cannot load script that does nothing.");
                }
                try {
                    scope = prepareClassLoaderScope();
                    ClassLoader loader = scope.getLocalClassLoader();
                    scriptClass = loader.loadClass(source.getClassName()).asSubclass(scriptBaseClass);
                } catch (Exception e) {