@Override
  public Optional<Factory> getFactory() {
    return Optional.of(new UnifiedDynamicTableFactory(availableCatalogs));
  }
Available Flink catalogs for Unified Catalog.

<p>May include: Iceberg, Mixed and Paimon Catalogs, etc.
amoro-format-mixed/amoro-mixed-flink/amoro-mixed-flink-common/src/main/java/org/apache/amoro/flink/catalog/FlinkUnifiedCatalog.java