   return nil
 }
 
-func convertToNumber(_ value: Any) -> NSNumber? {
+private func convertToNumber(_ value: Any) -> NSNumber? {
   switch value {
   case let value as Bool:
     return value as NSNumber

  }
}

func convertToDictionary(_ value: Any) -> [String: Any]? {
  switch value {
  case let value as [String: Any]:
    return value

  }
}

private func convertToString(_ value: Any) -> String? {
  switch value {
  case let value as String:
    return value
