@interface GKChallengeDataSource : GKDashboardChallengeDataSource
- (struct CGSize { double x0; double x1; })collectionView:(id)a0 layout:(id)a1 sizeForItemAtIndexPath:(id)a2;
- (double)collectionView:(id)a0 layout:(id)a1 minimumLineSpacingForSectionAtIndex:(long long)a2;
- (double)collectionView:(id)a0 layout:(id)a1 minimumInteritemSpacingForSectionAtIndex:(long long)a2;
- (id)collectionView:(id)a0 viewForSupplementaryElementOfKind:(id)a1 atIndexPath:(id)a2;
- (id)collectionView:(id)a0 cellForItemAtIndexPath:(id)a1;
- (void)setupCollectionView:(id)a0;
@end