Method BatchQueryFutureImpl

src/sdk/sql_cluster_router.cc:128–134

class BatchQueryFutureImpl : public QueryFuture {
 public:
    explicit BatchQueryFutureImpl(
            fedb::RpcCallback<fedb::api::SQLBatchRequestQueryResponse>* callback)
        : callback_(callback) {
            if (callback_) {
                callback_->Ref();
            }
    }

    ~BatchQueryFutureImpl() {
        if (callback_) {