@objc(Squirrel)
class Белка {
@objc(initWithName:)
init (имя: String) { /.../ }
@objc(hideNuts:inTree:)
func прячьОрехи(Int, вДереве: Дерево) { /.../ }
}

https://developer.apple.com/library/prerelease/ios/documentation/swift/conceptual/buildingcocoaapps/InteractingWithObjective-CAPIs.html#//apple_ref/doc/uid/TP40014216-CH4-XID_26

NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO!!!!