@Override
    public <T extends Script, M> ScriptRunner<T, M> create(CompiledScript<T, M> script, ScriptSource source, ClassLoader contextClassLoader) {
        return new ScriptRunnerImpl<T, M>(script, source, contextClassLoader);
    }

    private class ScriptRunnerImpl<T extends Script, M> implements ScriptRunner<T, M> {
        private final ScriptSource source;
        private final ClassLoader contextClassLoader;
        private T script;