I hope new is the only method that users would stub :D
Its the only one that matters / breaks, stubbing on an individual instance of mutex would affect only those instances, and stubbing using any_instance is just going to be something we don't support (its not really reasonable to).
Its the only one that matters / breaks, stubbing on an individual instance of mutex would affect only those instances, and stubbing using any_instance is just going to be something we don't support (its not really reasonable to).