MemoryAllocationCallbackRegistration  650 src/spaces.cc      MemoryAllocationCallbackRegistration registration =
MemoryAllocationCallbackRegistration  673 src/spaces.cc    MemoryAllocationCallbackRegistration registration(callback, space, action);
MemoryAllocationCallbackRegistration 1063 src/spaces.h       MemoryAllocationCallbackRegistration(MemoryAllocationCallback callback,
MemoryAllocationCallbackRegistration 1074 src/spaces.h     List<MemoryAllocationCallbackRegistration>