Debugger: Debugger-driven development workflow should allow for creation of traits at the same time as a class

Currently, when using a debugger-driven development style, it doesn't seem possible to create a class and any traits it might use, at the same time. A class that doesn't exist can be created on demand, but what about the case when such a class should use a trait that also doesn't exist? The trait can't be created on demand, along with the class.
