presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/RaptorPlugin.java/RaptorPlugin/getConnectorFactories
class RaptorPlugin:    @Override
    public Iterable<ConnectorFactory> getConnectorFactories()
    {
        return ImmutableList.of(new RaptorConnectorFactory(name, metadataModule, backupProviders));
    }