import UIKit

@objc public extension UIView {
    
    private static var key = "key"
    
    public var isKeySet: Bool {
        get {
            let value = objc_getAssociatedObject(self, &UIView.key)
            guard let key = value as? Bool else {
                return false
            }
            return key
        }
        
        set {
            objc_setAssociatedObject(self, &UIView.key, newValue, .OBJC_ASSOCIATION_RETAIN)
        }
    }
    
}