let MFMailComposeErrorDomain: NSString!

let MFMailComposeErrorDomain: String

let MFMessageComposeViewControllerAttachmentAlternateFilename: NSString!

let MFMessageComposeViewControllerAttachmentAlternateFilename: String

let MFMessageComposeViewControllerAttachmentURL: NSString!

let MFMessageComposeViewControllerAttachmentURL: String

let MFMessageComposeViewControllerTextMessageAvailabilityDidChangeNotification: NSString!

let MFMessageComposeViewControllerTextMessageAvailabilityDidChangeNotification: String

let MFMessageComposeViewControllerTextMessageAvailabilityKey: NSString!

let MFMessageComposeViewControllerTextMessageAvailabilityKey: String