DefineFastAccessor 4263 src/objects.cc       getterOk = DefineFastAccessor(name, ACCESSOR_GETTER, getter, attributes);
DefineFastAccessor 4269 src/objects.cc       setterOk = DefineFastAccessor(name, ACCESSOR_SETTER, setter, attributes);
DefineFastAccessor 1659 src/objects.h    MUST_USE_RESULT MaybeObject* DefineFastAccessor(