presto-iceberg/src/main/java/io/prestosql/plugin/iceberg/IcebergConnector.java/IcebergConnector/getMetadata
class IcebergConnector:    @Override
    public ConnectorMetadata getMetadata(ConnectorTransactionHandle transaction)
    {
        ConnectorMetadata metadata = transactionManager.get(transaction);
        return new ClassLoaderSafeConnectorMetadata(metadata, getClass().getClassLoader());
    }