SPUUpdateCheck
enum SPUUpdateCheck : NSInteger {}
                  Describes the type of update check being performed.
Each update check corresponds to an update check method on SPUUpdater.
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The user-initiated update check corresponding to
-[SPUUpdater checkForUpdates].Declaration
Objective-C
SPUUpdateCheckUpdates = 0 - 
                    
                    
The background scheduled update check corresponding to
-[SPUUpdater checkForUpdatesInBackground].Declaration
Objective-C
SPUUpdateCheckUpdatesInBackground = 1 - 
                    
                    
The informational probe update check corresponding to
-[SPUUpdater checkForUpdateInformation].Declaration
Objective-C
SPUUpdateCheckUpdateInformation = 2