presto-atop/src/main/java/io/prestosql/plugin/atop/AtopConnectorFactory.java/AtopConnectorFactory/AtopConnectorFactory
class AtopConnectorFactory:    public AtopConnectorFactory(Class<? extends AtopFactory> atopFactoryClass, ClassLoader classLoader)
    {
        this.atopFactoryClass = requireNonNull(atopFactoryClass, "atopFactoryClass is null");
        this.classLoader = requireNonNull(classLoader, "classLoader is null");
    }