re: Light NSFW, C#
It's how one defines a class in C# that inherits from multiple classes! Truncated for brevity, of course (Since this can only be done via interfaces, the resulting class *must* define all functions in the interfaces it's inheriting. Traditionally, this ends up being done by creating the "inherited" classes within the new class, and passing functions to either as needed). This is done to the standards of defining systems within an ECS structure (only systems can have code in ECS), and thus they are labelled accordingly.
Basically, stripping the joke down to its bare essence: Switch = Sub & Dom!