}

        @Override
        public byte[] instrumentClass(@Nullable String className, ProtectionDomain protectionDomain, byte[] classfileBuffer) {
            return replacer.getInstrumentedClass(className, protectionDomain);
        }

        @Override
        public void transformFailed(@Nullable String className, Throwable cause) {
            errorHandler.classLoadingError(className, cause);

     *
     * @see InstrumentingClassLoader#instrumentClass(String, ProtectionDomain, byte[])
     */
    @Nullable
    public byte[] getInstrumentedClass(@Nullable String className, @Nullable ProtectionDomain protectionDomain) {
        // Even though some classes don't need instrumentation, trying to query the closed TransformReplacer is still an error.
        ensureOpened();

        }

        @Override
        public byte[] instrumentClass(@Nullable String className, ProtectionDomain protectionDomain, byte[] classfileBuffer) {
            return replacer.getInstrumentedClass(className, protectionDomain);
        }

        @Override
        public void transformFailed(@Nullable String className, Throwable cause) {
            errorHandler.classLoadingError(className, cause);