44873   struct SequenceIterator {  struct in perfetto::TraceBuffer
44875     ChunkMap::iterator seq_begin;
44878     ChunkMap::iterator seq_end;
44881     ChunkMap::iterator cur;
44884     ChunkID wrapping_id;
44886     bool is_valid() const { return cur != seq_end; }  in is_valid()
44888     ProducerID producer_id() const {  in producer_id()
44893     WriterID writer_id() const {  in writer_id()
44898     ChunkID chunk_id() const {  in chunk_id()
44903     ChunkMeta& operator*() {  in operator *()
44913     void MoveToEnd() { cur = seq_end; }  in MoveToEnd()