APPLEMAIL-33 Add documentation to PEPUpdateDownloadXPCApiProtocol

Submodules/PEPUpdatesXPCService/PEPUpdatesXPCService/PEPUpdateDownloadXPCService/Shared/PEPUpdateDownloadXPCApiProtocol.h

@@ -11,26 +11,24 @@
 
 static NSString *pEpUpdateDownloadXPCMachName = @"foundation.pEp.adapter.macOS_OpenStep";
 
-/// This protocol is providing the XPC interface to the User Interface
+/// This protocol is providing the XPC interface for update downloads to pEp updates app.
 @protocol PEPUpdateDownloadXPCApiProtocol
 
-/**
- subscribe to the published notifications about downloads arriving
-
- - Parameter endpoint
- */
+/// Subscribe to the notifications about update downloads status.
+/// @param endpoint The anonymous endpoint from the update download notification status service
+/// in pEp updates app.
 - (void)subscribeForUpdate:(NSXPCListenerEndpoint*)endpoint;
 
-/// unsubscribe from receiving notifications about downloads arriving
+/// Unsubscribe from receiving notifications about update downloads status.
 - (void)unsubscribeForUpdate;
 
-/// search for immediate updates
+/// Check for update downloads.
 - (void)updateNow;
 
-/// schedules updates each 2 hours
+/// Schedules check for update downloads every 2 hours.
 - (void)scheduleUpdates;
 
-/// stop auto updates
+/// Stop schedule the update downloads.
 - (void)stopUpdates;
 
 @end