@class UICollectionView, CKChatItem, CKConversation; @protocol NSCollectionLayoutEnvironment; @interface CKLegacyTranscriptLayoutEnvironment : NSObject @property (retain, nonatomic) CKConversation *conversation; @property (retain, nonatomic) id collectionLayoutEnvironment; @property (retain, nonatomic) UICollectionView *collectionView; @property (nonatomic) struct UIEdgeInsets { double top; double left; double bottom; double right; } marginInsets; @property (nonatomic) long long layoutContext; @property (retain, nonatomic) CKChatItem *previousItem; - (id)init; - (void).cxx_destruct; @end