allocator_type    401 gc/include/new_gc_alloc.h   typedef __allocator<_Tp, gc_alloc > allocator_type;
allocator_type    421 gc/include/new_gc_alloc.h   typedef __allocator<_Tp, single_client_gc_alloc > allocator_type;
allocator_type    441 gc/include/new_gc_alloc.h   typedef __allocator<_Tp, traceable_alloc > allocator_type;
allocator_type    461 gc/include/new_gc_alloc.h   typedef __allocator<_Tp, single_client_traceable_alloc > allocator_type;