presto-spi/src/main/java/io/prestosql/spi/connector/ConnectorMetadata.java/ConnectorMetadata/finishInsert
class ConnectorMetadata:    default Optional<ConnectorOutputMetadata> finishInsert(ConnectorSession session, ConnectorInsertTableHandle insertHandle, Collection<Slice> fragments, Collection<ComputedStatistics> computedStatistics)
    {
        throw new PrestoException(GENERIC_INTERNAL_ERROR, "ConnectorMetadata beginInsert() is implemented without finishInsert()");
    }