I'm working on a project where I have created a class named Friend and just noticed that Xcode colors it like a keyword or a modifier. Can I use it like I did in my code, or it has other purpose?

![enter image description here](https://i.stack.imgur.com/qRuYB.png)

Updated:
It seems this is already answered here:

[Why does the xcode IDE think `friend` is a reserved-word](https://stackoverflow.com/questions/22362912/why-does-the-xcode-ide-think-friend-is-a-reserved-word)

But thanks for the help guys!