Tester for the PAppletFinder in Processing 4 required

[GoToLoop]

Get the current instance of PApplet from a library

Since Java 9 method setAccessible() also takes into consideration the module a reflected member belongs to: https://en.Wikipedia.org/wiki/Java_Platform_Module_System#Properties_of_modules There’s an --add-opens option for the Java’s command-line, but dunno how to add that to Processing: OpenJDK.org/jeps/261#Breaking-encapsulation