You can pass the ClassA instance to the private function as a parameter instead of as the this. If you're keeping each class in their own file and then compiling without the --bare option, i'd recommend putting that private function outside the class and use it just as a normal function (it will be private to the file, so no need to worry about leaking things outside).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.