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полностью виртуальный класс (a class with all its public methods and properties defined as virtual or abstract and with a default, parameterless constructor defined as public or protected github.io Alex_Odeychuk); чистый виртуальный класс (a class with all its public methods and properties defined as virtual or abstract and with a default, parameterless constructor defined as public or protected github.io Alex_Odeychuk) |