585         : Object::cast(heap->null_value());  in GetProperty()
655        holder != heap->null_value();  in GetElementWithReceiver()
730     return heap->null_value();  in GetPrototype()
2054        pt != heap->null_value();  in LookupCallbackSetterInPrototypes()
2077        pt != heap->null_value();  in SetElementWithCallbackSetterInPrototypes()
2538        pt != heap->null_value();  in LookupRealNamedPropertyInPrototypes()
4189        o != heap->null_value();  in IsSimpleEnum()
4302        current != heap->null_value();  in Lookup()
4315        current != heap->null_value() && current->IsJSObject();  in LookupCallback()
4690          obj != heap->null_value();  in LookupAccessor()
4707          obj != heap->null_value();  in LookupAccessor()
7622        obj != heap->null_value();  in CanGenerateInlineConstructor()
8680   for (Object* pt = value; pt != heap->null_value(); pt = pt->GetPrototype()) {  in SetPrototype()
9659   return isolate->heap()->null_value();  in SetElementWithoutInterceptor()
9723   return GetIsolate()->heap()->null_value();  in TransitionElementsKind()
9792   if (pt == heap->null_value()) return heap->undefined_value();  in GetElementWithInterceptor()
10152   return GetHeap()->null_value();  in HasRealElementProperty()