             return ("field format error")
         case .invalidData:
             return ("data corrupt")
-        
         }
     }
 }


public protocol Readable {
    static func contentfulEntryType() -> String
    static func unboxer(ofField field: String) -> UnboxedType?
    static func creator(withFields fields: UnboxedFields) -> Self
}


    case requiredKeyMissing(CodingKey)
    case fieldFormatError
    case invalidData
    
    public func errorMessage() -> String {
        switch self {
