Premade saveContext method for core data

[tazboy]

In a core data project, in the appDelegate, they have a premade function called - (void)saveContext, what's the reasoning behind using this line of code:

NSManagedObjectContext *managedObjectContext = self.managedObjectContext;

Entire function:

- (void)saveContext {
    
    NSError *error = nil;
	NSManagedObjectContext *managedObjectContext = self.managedObjectContext;
    if (managedObjectContext != nil) {
        if ([managedObjectContext hasChanges] && ![managedObjectContext save:&error]) {
            NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
            abort();
        } 
    }
}