             initialsString += familyName.substring(to: familyName.characters.index(after: familyName.startIndex))
         }
         if initialsString.characters.count == 0 {
-            initialsString = "?"
+            return nil
         }
         return initialsString.uppercased()
     }

    var givenName: String? { get }
    var familyName: String? { get }
}


public extension NamePresentable {
    

        return fullName
    }
    
    public var initials: String? {
        var initialsString = String()
        if let givenName = givenName , givenName.characters.count > 0 {
            initialsString += givenName.substring(to: givenName.characters.index(after: givenName.startIndex))
