Why does the component library not contain BJT components?

Problem description: 

I am used to modeling a switch with a low turn-on voltage using an NPN and a PNP transistor component. Why aren't they in the PLECS library?


PLECS is about system simulations where semiconductors are modeled as ideal switches controlled by logical gate signals. On this abstraction level, the behavior of a BJT is very much the same as that of an IGBT (without an anti-parallel diode), which is provided in the PLECS component library.