private byte[] get(final byte[] key) {
        return new SyncKVStore<byte[]>() {
            @Override
            public void execute(RawKVStore kvStore, KVStoreClosure closure) {
                kvStore.get(key, closure);
            }
        }.apply(this.kvStore);
    }
Test method: {@link RocksRawKVStore#delete(List, KVStoreClosure)}
jraft-rheakv/rheakv-core/src/test/java/com/alipay/sofa/jraft/rhea/storage/rocksdb/RocksKVStoreTest.java