sterretje:
@Juraj, so the build tool gets it right nowadays? It used to fail miserably when using function pointers if the function was defined after using the function pointer (e.g. assign it to an element of an array of function pointers).
I use Eclipse IDE Arduino Sloeber plugin and it does it right. I have Arduino 1.8.5 IDE installed and it still has the problem with function pointers and Blynk macros