@Override
    public Database getDb(String dbName) {
        return get(databaseCache, dbName);
    }
@Test
    public void testGetDb() {
        CachingDeltaLakeMetastore cachingDeltaLakeMetastore =
                CachingDeltaLakeMetastore.createCatalogLevelInstance(metastore, executor, expireAfterWriteSec,
                        refreshAfterWriteSec, 100);

        Database database = cachingDeltaLakeMetastore.getDb("db1");
        Assert.assertEquals("db1", database.getFullName());
    }