void add(int sourcePosition, PassOwnPtr<SourceProviderCacheItem>, unsigned size);
const SourceProviderCacheItem* get(int sourcePosition) const { return m_map.get(sourcePosition); }
private:
void add(int sourcePosition, PassOwnPtr<SourceProviderCacheItem>, unsigned size);
const SourceProviderCacheItem* get(int sourcePosition) const { return m_map.get(sourcePosition); }
private: