183   struct ByteSpan {  struct in __anon2c83e0c90111::AlignVectors
184     struct Segment {
195     struct Block {
210     int size() const { return Blocks.size(); }  in size()
211     Block &operator[](int i) { return Blocks[i]; }  in operator []()
213     std::vector<Block> Blocks;
215     using iterator = decltype(Blocks)::iterator;
216     iterator begin() { return Blocks.begin(); }  in begin()
217     iterator end() { return Blocks.end(); }  in end()
218     using const_iterator = decltype(Blocks)::const_iterator;
219     const_iterator begin() const { return Blocks.begin(); }  in begin()
220     const_iterator end() const { return Blocks.end(); }  in end()