@a-shchedrin8466

Thanks for these lessons! Very clearly definitions!

@mauricio0guaruja

is agregation still a problem considering the possibility of treating null references? In java we can have Optional types to deal with agregation, in kotlin you can use nullable types which will behave similarly as the Optional type.

@artemiosdev

Добрый день) Данный курс лекций есть на русском?

@alsayehsoft

Would you please complete 14 diagrams or at least structural diagrams?