Method SetPrevLogNumber

src/leveldb/db/version_edit.h:44–47

    log_number_ = num;
  }
  void SetPrevLogNumber(uint64_t num) {
    has_prev_log_number_ = true;
    prev_log_number_ = num;
  }
  void SetNextFile(uint64_t num) {
    has_next_file_number_ = true;
    next_file_number_ = num;