Here it is the final SOLID principle the Dependency Inversion Principle. In this brief video we'll talk about Robert Martin's premise that:
A. High-level modules should not depend on low-level modules. Both should depend on abstractions.
B. Abstractions should not depend upon details. Details should depend upon abstractions.
Shoutout
The opening drawing of 'inverted dependents' was originally by Tim Musgrove, it made me laugh, full credit to him for that :)