"ledPin" in Writing a Library for Arduino

[UNOSweeper]

The variable ledPin , mentioned in the text ( "Writing a Library for Arduino" at https://www.arduino.cc/en/Hacking/LibraryTutorial: (quote) "Second, there's the ledPin variable which the functions use to determine which pin to use." cannot be found in the sketch (a sketch that does simple Morse code) above that text.