Simple Class wrapper for Swift structures. Useful for NSNotificationCenter, for example

Wrapper.swift

// Wrapper.swift
// Wrap Swift structure into the class. Useful in some operations with NSFoundation classes, 
// e.g. NSNotificationCenter.postNotificationName
// Gist: https://gist.github.com/alsedi/6c8f5f0e313ea490aa69

class Wrapper<T> {
    private var value: T
    init(_ value: T) { self.value = value }
    func unwrap() -> T { return self.value }
}