SafeArea Class don't exists

[ReiLoko4]

I have a idea with SafeArea when I looked the class on docs, but when I try to use that class, it doesn't exists.

I don't know if this is really a bug but I'm really interested about this class.

Sorry for any inconvenience :)

[ReiLoko4]

I trying to use in a pc on my high school now with linux and it works? Btw idk why, i checked the version and its the same :/
sorry