gistfile1.txt

@protocol SnapshotCancellation
- (void)cancel;
@end


+ (id<SnapshotCancellation>)snapshotOfFolder:(NSString*)folder withBlock:(void(^)(Snapshot* shot))block {
	Snapshot* s = [[Snapshot alloc] initWithFolder:folder];
	[s scanWithCompletion:block];
	return s;
}

- (void)cancel {
	[self cancelScan];
}