ExternalArrayWeakCallback  348 src/d8.cc        persistent_array.MakeWeak(data, ExternalArrayWeakCallback);
ExternalArrayWeakCallback 1388 src/d8.cc        persistent_buffer.MakeWeak(data, ExternalArrayWeakCallback);
ExternalArrayWeakCallback  403 src/d8.h         static void ExternalArrayWeakCallback(Persistent<Value> object, void* data);