code: private Referenceable getDatabaseReference(String clusterName, String databaseName) throws Exception {
          LOG.debug("Getting reference for database {}", databaseName);
          String typeName = HiveDataTypes.HIVE_DB.getName();
  
          return getEntityReference(typeName, getDBQualifiedName(clusterName, databaseName));
      }
docs: Gets reference to the atlas entity for the database
  @param databaseName  database Name
  @param clusterName    cluster name
  @return Reference for database if exists, else null
  @throws Exception