presto-main/src/main/java/io/prestosql/connector/ConnectorManager.java/InternalConnectorFactory/InternalConnectorFactory
class InternalConnectorFactory:        public InternalConnectorFactory(ConnectorFactory connectorFactory, Supplier<ClassLoader> duplicatePluginClassLoaderFactory)
        {
            this.connectorFactory = connectorFactory;
            this.duplicatePluginClassLoaderFactory = duplicatePluginClassLoaderFactory;
        }