saagarjha

//
// Logic necessary to implement a "closing handler" for a NSDocument
//
// This is inspired by: 
// - https://stackoverflow.com/questions/49343307/best-practice-to-implement-canclosewithdelegateshouldclosecontextinfo
// - https://github.com/keith/radars/blob/master/NSDocumentSwiftAnnotations/NSDocumentSwiftAnnotations/Document.swift
//   Keith's supporting documentation for his radar submission: http://www.openradar.me/33422662  
// Documentation:
// - https://developer.apple.com/library/content/releasenotes/AppKit/RN-AppKitOlderNotes/
//   Paragraph called: "Advice for Overriders of Methods that Follow the delegate:didSomethingSelector:contextInfo: Pattern"