The rule should only care about enclosing function/class scopes. For example if an ObservableScope is received as a parameter to a function and then simply used inside an 'if' block (technically a different scope), that's not a problem.
The rule should only care about enclosing function/class scopes. For example if an ObservableScope is received as a parameter to a function and then simply used inside an 'if' block (technically a different scope), that's not a problem.