code: func (ui *PrefixUI) Output(message string) {
  	if ui.OutputPrefix == " " { //Lets keep the space if they want one
  		message = ui.OutputPrefix + message
  	} else if ui.OutputPrefix != "" {
  		message = ui.OutputPrefix + " " + message
  	}
  	ui.UI.Output(message)
  }
docs: // Output calls UI.Output to write.
  // OutputPrefix is used to prefix the message.