I never used C++'s scoped locks but as far as I can tell they perform runtime deadlock detection while this crate is compile-time only with near to none code produced in the resulting binary.

This is done by enforcing to either lock every Mutex the thread needs at once or none at all. Thread keys are used to represent this with the type system.

Isn’t this how it always looked when treeview is enabled? Look for the option in the View dropdown menu.