In other UML tools like Rhapsody and MagicDraw, there is a feature that allows you to "animate/execute" and "debug" your models. It basically allows you to step through the execution of your model and allows you to logically see how everything plays together. It's sort of a simulation verification before you get to actual coding.
Does anyone know if there is anything like that for plantUML? I understand that this is not an easy thing to implement, but I was curious if there might be something out there.