Class helpers allow you to extend the functionality of RTL, VCL, and FireMonkey classes. They are very helpful when cleaning the code, especially in large applications. Thanks to such an easy solution, Delphi developers can significantly improve the quality and readability of the code. Although, on the other hand, they also have a dark side; for example, one base class can have only one helper. During this session, I will share my experience with class helpers used during the modernization process. There will be many code examples.