Method SeekToLast

src/leveldb/table/merger.cc:39–45

  }

  void SeekToLast() override {
    for (int i = 0; i < n_; i++) {
      children_[i].SeekToLast();
    }
    FindLargest();
    direction_ = kReverse;
  }

  void Seek(const Slice& target) override {
    for (int i = 0; i < n_; i++) {