#include <google/protobuf/arena.h> namespace google::protobuf This file defines an Arena allocator for better allocation performance. Classes in this fileArenaOptionsArenaOptions provides optional additional parameters to arena construction that control its block-allocation behavior. ArenaArena allocator. Arena::InternalHelperArena::is_arena_constructableHelper typetraits that indicates support for arenas in a type T at compile time. Arena::is_destructor_skippablestruct ArenaOptions#include <...