presto-spi/src/main/java/io/prestosql/spi/connector/classloader/ClassLoaderSafeSystemTable.java/ClassLoaderSafeSystemTable/getTableMetadata
class ClassLoaderSafeSystemTable:    @Override
    public ConnectorTableMetadata getTableMetadata()
    {
        try (ThreadContextClassLoader ignored = new ThreadContextClassLoader(classLoader)) {
            return delegate.getTableMetadata();
        }
    }