presto-spi/src/main/java/io/prestosql/spi/connector/classloader/ClassLoaderSafeConnectorPageSink.java/ClassLoaderSafeConnectorPageSink/appendPage
class ClassLoaderSafeConnectorPageSink:    @Override
    public CompletableFuture<?> appendPage(Page page)
    {
        try (ThreadContextClassLoader ignored = new ThreadContextClassLoader(classLoader)) {
            return delegate.appendPage(page);
        }
    }