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| override func invalidateLayout(with context: UICollectionViewLayoutInvalidationContext) { | |
| let invalidationContext = context as! CustomLayoutInvalidationContext | |
| if invalidationContext.invalidatedBecauseOfBoundsChange || invalidationContext.invalidateEverything { | |
| layoutAttributesForItems.removeAll() | |
| } | |
| super.invalidateLayout(with: invalidationContext) | |
| } |
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