protected T getSessionCatalog() {
    Preconditions.checkNotNull(
        sessionCatalog,
        "Delegated SessionCatalog is missing. "
            + "Please make sure your are replacing Spark's default catalog, named 'spark_catalog'.");
    return sessionCatalog;
  }
Base class of spark session catalog.
amoro-format-mixed/amoro-mixed-spark/amoro-mixed-spark-3-common/src/main/java/org/apache/amoro/spark/SessionCatalogBase.java