NSMutableDictionary is Key value pair existing the dictionary. swit

isKeyValue

extension NSMutableDictionary {
    func isExist(forKey key: String) -> Bool {
        return self[key] != nil
    }
    func isKeyValue<T: Equatable> (value: T, forKey key: String) -> Bool {
        if(!isExist(forKey: key)){
            return false
        }
        let val = self[key] as! T
        return val == value
    }
    
}