i.e.: Activity have an TextView that must be updated since Fragment but this TextView is a lateinit var that might not have been initialized when thisFragment updates its value. I am trying to check if it's null with ? operator but this always give me that variable cannot be null.

If you need to check lateinit property, usually it sign that you just need nullable property instead

Okey I am going to update that textview to nullable property

There is special

::property.isInitialized

intrinsic, but I wouldn’t recommend to use it, just make property nullable

Yup I know about that but it's only working in the class that contains the lateinit property if I call that outside the Activity class that contains the property it does not work

Again, if you have case when property have to be checked just use nullable, this is exactly why nullable exist

Okey @gildor thank you dude!