Maybe I'm missing something. I'm not saying to remove the null check in `subscribeObservable`. But that should really just be a sanity check which should never happen if the rest of the code is correct.
All I'm saying is for this line https://github.com/KSHSK/WAVED/pull/143/files#diff-15eee641fb3a21afb228d59d80f6632aR77 to put an if statement around that area saying `if(defined(nestedProp._value))`.
Does that make sense or am I still missing something?