Extern classes
Extern classes allow one to tell the compiler what classes exist outside of your own code. This way, the compiler won't tell you that the class does not exist and it will also know what fields exist in it and what their type is.
Extern classes allow one to tell the compiler what classes exist outside of your own code. This way, the compiler won't tell you that the class does not exist and it will also know what fields exist in it and what their type is.