Added in Version 1.0.0

DisplayDelegate

The protocol that defines the status event for the customer display

Method
displayDidConnect(printer: StarPrinter)	Notify that the customer display is connected
displayDidDisconnect(printer: StarPrinter)	Notify that the customer display is disconnected
display(printer: StarPrinter, communicationErrorDidOccur error: Error)	Notify that a communication error occurred