* The suggested pattern is to override the {@link ClassLoader#findClass(String)}:
 * <pre>
 * <code>
 *
 * private final TransformErrorHandler handler = new TransformErrorHandler("loader-name")
 *
 * protected Class&lt;?&gt; findClass(String name) throws ClassNotFoundException {
 *     handler.enterClassLoadingScope(name);
 *     Class&lt;?&gt; result;
 *     try {

        e.message.contains("class $scopeClass in $LOADER_NAME")
        e.cause != null && e.cause.message.contains("class $outOfScopeClass in $LOADER_NAME")
    }

    private static TransformErrorHandler handler() {
        return new TransformErrorHandler(LOADER_NAME)
    }

        private final TransformReplacer replacer;
        private final TransformErrorHandler errorHandler;

        public InstrumentingVisitableURLClassLoader(String name, ClassLoader parent, TransformedClassPath classPath) {
            super(name, parent, classPath);
            replacer = new TransformReplacer(classPath);
            errorHandler = new TransformErrorHandler(name);
        }

        @Override

        private final TransformErrorHandler errorHandler;

        InstrumentingScriptClassLoader(ScriptSource scriptSource, ClassLoader parent, TransformedClassPath classPath, HashCode implementationHash) {
            super(scriptSource, parent, classPath, implementationHash);
            replacer = new TransformReplacer(classPath);
            errorHandler = new TransformErrorHandler(getName());
        }