presto-spi/src/main/java/io/prestosql/spi/connector/classloader/ClassLoaderSafeConnectorMetadata.java/ClassLoaderSafeConnectorMetadata/beginQuery
class ClassLoaderSafeConnectorMetadata:    @Override
    public void beginQuery(ConnectorSession session, Collection<ConnectorTableHandle> tableHandles)
    {
        try (ThreadContextClassLoader ignored = new ThreadContextClassLoader(classLoader)) {
            delegate.beginQuery(session, tableHandles);
        }
    }