@interface GameCenterUI.GKExpandedGroupViewController : GameCenterUI.GKExpandedGroupBaseViewController <UICollectionViewDelegateFlowLayout, UICollectionViewDataSource> { void /* unknown type, empty encoding */ cornerRadius; void /* unknown type, empty encoding */ pickerPlayerCellReuseIdentifier; void /* unknown type, empty encoding */ pickerPlayerCellReuseIdentifierAX; void /* unknown type, empty encoding */ dataSourceIdentifier; void /* unknown type, empty encoding */ playerSelectionProxy; void /* unknown type, empty encoding */ multiplayerPickerDataSource; void /* unknown type, empty encoding */ selectedPlayerCount; void /* unknown type, empty encoding */ maxPlayerCount; void /* unknown type, empty encoding */ players; } @property (nonatomic, weak) void /* unknown type, empty encoding */ doneButton; @property (nonatomic, weak) void /* unknown type, empty encoding */ collectionView; @property (nonatomic, weak) void /* unknown type, empty encoding */ contentViewWidthConstraint; @property (nonatomic, weak) void /* unknown type, empty encoding */ visualEffectView; @property (nonatomic, weak) void /* unknown type, empty encoding */ container; @property (nonatomic, weak) void /* unknown type, empty encoding */ titleLabel; @property (nonatomic, weak) void /* unknown type, empty encoding */ collectionViewHeightConstraint; @property (nonatomic, weak) void /* unknown type, empty encoding */ delegate; - (struct CGSize { double x0; double x1; })collectionView:(id)a0 layout:(id)a1 sizeForItemAtIndexPath:(id)a2; - (void)viewWillAppear:(BOOL)a0; - (void)traitCollectionDidChange:(id)a0; - (void)viewDidLayoutSubviews; - (void)viewDidLoad; - (id)initWithNibName:(id)a0 bundle:(id)a1; - (void)viewWillDisappear:(BOOL)a0; - (void).cxx_destruct; - (BOOL)collectionView:(id)a0 shouldSelectItemAtIndexPath:(id)a1; - (long long)collectionView:(id)a0 numberOfItemsInSection:(long long)a1; - (id)collectionView:(id)a0 cellForItemAtIndexPath:(id)a1; - (id)initWithCoder:(id)a0; - (BOOL)collectionView:(id)a0 shouldDeselectItemAtIndexPath:(id)a1; - (void)doneButtonPressed; - (void)dismissView; - (void)configureWithPlayers:(id)a0 groupName:(id)a1 caption:(id)a2 playerSelectionProxy:(id)a3; @end