PropertyData Accessor

PropertyData.swift

@propertyWrapper
public class Property<T: Any> {

    public var wrappedValue: T? {
        get { PropertyData.get(key) ?? nil }
        set { PropertyData.set(key, value: newValue as Any) }
    }

    let key: Weak<AnyObject>

    public init(_ key: AnyObject) {
        self.key = Weak(key)
    }
}