CopyAdd           895 src/factory.cc   MaybeObject* obj = array->CopyAdd(&desc);
CopyAdd          4815 src/objects.cc   MaybeObject* maybe_descriptors = instance_descriptors()->CopyAdd(descriptor);
CopyAdd          4836 src/objects.cc     maybe_descriptors = old_descriptors->CopyAdd(descriptor);
CopyAdd          2568 src/objects.h    MUST_USE_RESULT MaybeObject* CopyAdd(Descriptor* descriptor);