@interface _TtCC8VideosUI21RootSideBarController25RootSideBarCollectionView : UICollectionView {
void /* unknown type, empty encoding */ contentSizeDidChangeHandler;
}
@property (nonatomic) struct CGSize { double x0; double x1; } contentSize;
- (id)initWithFrame:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0 collectionViewLayout:(id)a1;
- (void).cxx_destruct;
- (id)initWithCoder:(id)a0;
@end