Я думаю, что Вы не правы. Я уверен. Пишите мне в PM, поговорим.
To reuse the code which yourself or person has already written, you will be able provide a class derived from another stardom and [url=https://bitbucket.org/questionsall/workspace/snippets/Gzygdb]https://bitbucket.org/questionsall/workspace/snippets/Gzygdb[/url], thus inheriting all graphs and methods from such another class.