182   struct ByteSpan {  struct in __anonf8b19ccd0111::AlignVectors
183     struct Segment {
193     struct Block {
207     int size() const { return Blocks.size(); }  in size()
208     Block &operator[](int i) { return Blocks[i]; }  in operator []()
210     std::vector<Block> Blocks;
212     using iterator = decltype(Blocks)::iterator;
213     iterator begin() { return Blocks.begin(); }  in begin()
214     iterator end() { return Blocks.end(); }  in end()
215     using const_iterator = decltype(Blocks)::const_iterator;
216     const_iterator begin() const { return Blocks.begin(); }  in begin()
217     const_iterator end() const { return Blocks.end(); }  in end()