Bug is back in Unity 6000.0

the decompiled code for `SerializedObject.targetObject` looks like this:
```csharp
public UnityEngine.Object targetObject
{
get
{
IntPtr intPtr = BindingsMarshaller.ConvertToNative(this);
if (intPtr == (IntPtr)0)
{
ThrowHelper.ThrowNullReferenceException(this);
}

return Unmarshal.UnmarshalUnityObject<UnityEngine.Object>(get_targetObject_Injected(intPtr));
}
}
```

so, it throws a null-ref-exception if the internal pointer is null. But the `BindingMarshaller` is internal as well as `m_NativeObjectPtr`. I thought I found a property that is made for public access: `isValid` - but this one is internal as well. So I am forced to use try-catch here. why?