sg_size_t getUsedSize() { return usedSize_; }
void decrUsedSize(sg_size_t size) { usedSize_ -= size; }
void incrUsedSize(sg_size_t size) { usedSize_ += size; }
private:
std::map<std::string, sg_size_t>* content_;
sg_size_t usedSize_ = 0;
sg_size_t getUsedSize() { return usedSize_; }
void decrUsedSize(sg_size_t size) { usedSize_ -= size; }
void incrUsedSize(sg_size_t size) { usedSize_ += size; }
private:
std::map<std::string, sg_size_t>* content_;
sg_size_t usedSize_ = 0;