presto-spi/src/main/java/io/prestosql/spi/connector/classloader/ClassLoaderSafeConnectorMetadata.java/ClassLoaderSafeConnectorMetadata/getSystemTable
class ClassLoaderSafeConnectorMetadata:    @Override
    public Optional<SystemTable> getSystemTable(ConnectorSession session, SchemaTableName tableName)
    {
        try (ThreadContextClassLoader ignored = new ThreadContextClassLoader(classLoader)) {
            return delegate.getSystemTable(session, tableName);
        }
    }