@class NSString, NSArray, _UICollectionViewLayoutSwipeActionsModule, UICollectionViewLayoutInvalidationContext, NSMutableDictionary, UIDynamicAnimator, _UICollectionViewCompositionLayout, UICollectionView, _UICollectionViewAnimationContext, NSIndexSet, UIColor;

@interface UICollectionViewLayout : NSObject <_UICollectionViewLayoutOrthogonalScrolling, _UICollectionViewLayoutSwipeActions, NSCoding> {
    struct CGSize { double width; double height; } _collectionViewBoundsSize;
    NSMutableDictionary *_initialAnimationLayoutAttributesDict;
    NSMutableDictionary *_finalAnimationLayoutAttributesDict;
    NSMutableDictionary *_deletedSupplementaryIndexPathsDict;
    NSMutableDictionary *_insertedSupplementaryIndexPathsDict;
    NSMutableDictionary *_deletedDecorationIndexPathsDict;
    NSMutableDictionary *_insertedDecorationIndexPathsDict;
    NSMutableDictionary *_decorationViewClassDict;
    NSMutableDictionary *_decorationViewNibDict;
    NSMutableDictionary *_decorationViewExternalObjectsTables;
    UICollectionViewLayout *_transitioningFromLayout;
    UICollectionViewLayout *_transitioningToLayout;
    UIDynamicAnimator *_animator;
    UICollectionViewLayoutInvalidationContext *_invalidationContext;
    _UICollectionViewLayoutSwipeActionsModule *_swipeActionsModule;
    struct CGRect { struct CGPoint { double x; double y; } origin; struct CGSize { double width; double height; } size; } _frame;
    NSIndexSet *_sections;
    NSIndexSet *_items;
    NSArray *_elementKinds;
    _UICollectionViewCompositionLayout *_compositionLayout;
    UICollectionViewLayout *_siblingLayout;
    struct CGPoint { double x; double y; } _layoutOffset;
    unsigned long long _layoutOffsetEdges;
    struct { unsigned char inTransitionFromTransitionLayout : 1; unsigned char inTransitionToTransitionLayout : 1; unsigned char prepared : 1; unsigned char wantsRightToLeftHorizontalMirroringIfNeeded : 1; unsigned char isEditing : 1; } _layoutFlags;
}

@property (nonatomic, getter=_frame, setter=_setFrame:) struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; } frame;
@property (copy, nonatomic, getter=_sections, setter=_setSections:) NSIndexSet *sections;
@property (copy, nonatomic, getter=_items, setter=_setItems:) NSIndexSet *items;
@property (copy, nonatomic, getter=_elementKinds, setter=_setElementKinds:) NSArray *elementKinds;
@property (nonatomic, getter=_compositionLayout, setter=_setCompositionLayout:) _UICollectionViewCompositionLayout *compositionLayout;
@property (nonatomic, getter=_siblingLayout, setter=_setSiblingLayout:) UICollectionViewLayout *siblingLayout;
@property (nonatomic, getter=_layoutOffset, setter=_setLayoutOffset:) struct CGPoint { double x0; double x1; } layoutOffset;
@property (nonatomic, getter=_layoutOffsetEdges, setter=_setLayoutOffsetEdges:) unsigned long long layoutOffsetEdges;
@property (nonatomic, getter=_sublayoutType, setter=_setSublayoutType:) long long sublayoutType;
@property (nonatomic, getter=_isPrepared, setter=_setPrepared:) BOOL prepared;
@property (retain, nonatomic, getter=_collectionViewAnimationContext, setter=_setCollectionViewAnimationContext:) _UICollectionViewAnimationContext *collectionViewAnimationContext;
@property (retain, nonatomic, getter=_preferredBackgroundColor, setter=_setPreferredBackgroundColor:) UIColor *preferredBackgroundColor;
@property (readonly, nonatomic, getter=_focusFastScrollingIndexBarInsets) struct UIEdgeInsets { double x0; double x1; double x2; double x3; } focusFastScrollingIndexBarInsets;
@property (readonly, nonatomic, getter=_isInLayoutTransition) BOOL _isInLayoutTransition;
@property (readonly, nonatomic) UICollectionView *collectionView;
@property (readonly) unsigned long long hash;
@property (readonly) Class superclass;
@property (readonly, copy) NSString *description;
@property (readonly, copy) NSString *debugDescription;

+ (Class)layoutAttributesClass;
+ (Class)invalidationContextClass;

- (BOOL)_wantsUntrackedAnimationCleanupForAuxillaryItems;
- (void)_didEndSwiping;
- (id)_extendedAttributesQueryIncludingOrthogonalScrollingRegions:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0;
- (BOOL)_wantsAnimationsForOffscreenAuxillaries;
- (BOOL)_shouldInvalidateLayoutForUpdatedLayoutMargins:(struct UIEdgeInsets { double x0; double x1; double x2; double x3; })a0 fromOldMargins:(struct UIEdgeInsets { double x0; double x1; double x2; double x3; })a1;
- (id)_invalidationContextForUpdatedLayoutMargins:(struct UIEdgeInsets { double x0; double x1; double x2; double x3; })a0;
- (void)_setOffset:(struct CGPoint { double x0; double x1; })a0 forOrthogonalScrollingSection:(long long)a1;
- (struct CGSize { double x0; double x1; })collectionViewContentSize;
- (void)_willPerformUpdateVisibleCellsPass;
- (double)_alignedContentMarginGivenMargin:(double)a0;
- (BOOL)_shouldInvalidateLayoutForDataSourceChange;
- (long long)_anchorForAuxiliaryElementOfKind:(id)a0;
- (unsigned long long)_edgesForSafeAreaPropagationToDescendants;
- (id)_leadingSwipeActionsConfigurationForIndexPath:(id)a0;
- (BOOL)_shouldAddElementToSectionContainer:(id)a0;
- (void)_postProcessPreferredAttributes:(id)a0 forView:(id)a1;
- (BOOL)_shouldOrthogonalScrollingSectionDecorationScrollWithContentForIndexPath:(id)a0 elementKind:(id)a1;
- (struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })_orthogonalFrameWithOffsetElidedForItemWithLayoutAttributes:(id)a0 frame:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a1;
- (id)layoutAttributesForInteractivelyMovingItemAtIndexPath:(id)a0 withTargetPosition:(struct CGPoint { double x0; double x1; })a1;
- (BOOL)_wantsBandSelectionVisualsInSection:(long long)a0;
- (BOOL)_supportsSwipeActionsForIndexPath:(id)a0;
- (void)_willBeginSwiping;
- (struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })_layoutFrameForSection:(long long)a0;
- (BOOL)_shouldInvalidateLayoutForUpdatedSafeAreaInsets:(struct UIEdgeInsets { double x0; double x1; double x2; double x3; })a0 fromOldInsets:(struct UIEdgeInsets { double x0; double x1; double x2; double x3; })a1;
- (id)finalLayoutAttributesForDisappearingDecorationElementOfKind:(id)a0 atIndexPath:(id)a1;
- (BOOL)_wantsUpdateVisibleCellsPassNotifications;
- (BOOL)shouldInvalidateLayoutForBoundsChange:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0;
- (id)invalidationContextForBoundsChange:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0;
- (unsigned long long)_layoutAxis;
- (void)_prepareLayout;
- (BOOL)_disallowsFadeCellsForBoundsChange;
- (id)indexPathsToInsertForSupplementaryViewOfKind:(id)a0;
- (BOOL)_overridesSafeAreaPropagationToDescendants;
- (BOOL)_wantsCustomSectionContainers;
- (double)_orthogonalScrollingDecelerationRateForSection:(long long)a0;
- (BOOL)_cellsShouldConferWithAutolayoutEngineForSizingInfo;
- (struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })_contentFrameForSection:(long long)a0;
- (BOOL)_hasOrthogonalScrollingSections;
- (struct CGPoint { double x0; double x1; })_offsetForOrthogonalScrollingSection:(long long)a0;
- (BOOL)_orthogonalScrollingElementShouldAppearBelowForAttributes:(id)a0;
- (void)invalidateLayoutWithContext:(id)a0;
- (void)prepareLayout;
- (BOOL)_allowsItemInteractionsToBegin;
- (void)_collectionViewWillPerformPendingLayoutBeforeUpdate;
- (id)invalidationContextForPreferredLayoutAttributes:(id)a0 withOriginalAttributes:(id)a1;
- (BOOL)_shouldOrthogonalScrollingSectionSupplementaryScrollWithContentForIndexPath:(id)a0 elementKind:(id)a1;
- (struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })_orthogonalScrollingLayoutRectForSection:(long long)a0;
- (struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })_orthogonalScrollingContentRectForSection:(long long)a0;
- (BOOL)_preparedForBoundsChanges;
- (BOOL)_shouldAdjustTargetContentOffsetToValidateContentExtents;
- (id)_orthogonalScrollingSections;
- (id)layoutAttributesForSupplementaryViewOfKind:(id)a0 atIndexPath:(id)a1;
- (void)_prepareForCollectionViewUpdates:(id)a0 withDataSourceTranslator:(id)a1;
- (id)indexPathsToDeleteForDecorationViewOfKind:(id)a0;
- (void)_prepareForPreferredAttributesQueryForView:(id)a0 withLayoutAttributes:(id)a1;
- (id)_sectionDescriptorForSectionIndex:(long long)a0;
- (id)_propertyAnimatorForCollectionViewUpdates:(id)a0 withCustomAnimator:(id)a1;
- (id)_trailingSwipeActionsConfigurationForIndexPath:(id)a0;
- (void)_prepareForTransitionToLayout:(id)a0;
- (BOOL)shouldInvalidateLayoutForPreferredLayoutAttributes:(id)a0 withOriginalAttributes:(id)a1;
- (BOOL)_estimatesSizes;
- (BOOL)_allowsPanningAcrossConstrainedAxisToBeginMultiSelectInteractionInSection:(long long)a0;
- (id)layoutAttributesForElementsInRect:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0;
- (id)indexPathsToInsertForDecorationViewOfKind:(id)a0;
- (void)_didPerformUpdateVisibleCellsPassWithLayoutOffset:(struct CGPoint { double x0; double x1; })a0;
- (BOOL)_wantsInvalidateLayoutForPreferredLayoutAttributes;
- (id)finalLayoutAttributesForDisappearingItemAtIndexPath:(id)a0;
- (unsigned long long)_orthogonalScrollingAxis;
- (id)_customContainerSectionIndexes;
- (BOOL)canBeEdited;
- (id)init;
- (void)_cellBackgroundOrBottomSeparatorChangedAtIndexPath:(id)a0 separatorOnly:(BOOL)a1;
- (struct CGPoint { double x0; double x1; })_targetPositionForInteractiveMovementOfItemAtIndexPath:(id)a0 withProposedTargetPosition:(struct CGPoint { double x0; double x1; })a1;
- (void)_setCollectionView:(id)a0;
- (BOOL)_supportsPrefetchingWithEstimatedSizes;
- (id)layoutAttributesForItemAtIndexPath:(id)a0;
- (void)_finalizeCollectionViewUpdate:(id)a0;
- (struct NSDirectionalEdgeInsets { double x0; double x1; double x2; double x3; })_supplementaryViewInsetsForScrollingToItemAtIndexPath:(id)a0;
- (id)indexPathsToDeleteForSupplementaryViewOfKind:(id)a0;
- (void)_scrollViewLayoutAdjustmentsChanged;
- (void)_updateStyleForSwipeActionsConfiguration:(id)a0 indexPath:(id)a1;
- (id)_layoutAttributesForIndelibleElements;
- (BOOL)_estimatesSupplementaryItems;
- (id)layoutAttributesForDecorationViewOfKind:(id)a0 atIndexPath:(id)a1;
- (BOOL)_orthogonalScrollingElementShouldAppearAboveForAttributes:(id)a0;
- (void)encodeWithCoder:(id)a0;
- (struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })bounds;
- (struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })convertRect:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0 toLayout:(id)a1;
- (id)initialLayoutAttributesForAppearingItemAtIndexPath:(id)a0;
- (void).cxx_destruct;
- (struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })_dynamicReferenceBounds;
- (void)setEditing:(BOOL)a0;
- (struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })convertRect:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0 fromLayout:(id)a1;
- (void)invalidateLayout;
- (id)initWithCoder:(id)a0;
- (BOOL)isEditing;
- (BOOL)_shouldScrollToContentBeginningInRightToLeft;
- (void)prepareForTransitionFromLayout:(id)a0;
- (void)prepareForAnimatedBoundsChange:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0;
- (id /* block */)_animationForReusableView:(id)a0 toLayoutAttributes:(id)a1;
- (id /* block */)_animationForReusableView:(id)a0 toLayoutAttributes:(id)a1 type:(unsigned long long)a2;
- (struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })_centerInsertionIndicatorFrame:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0 targetAttributes:(id)a1 axis:(unsigned long long)a2 edges:(unsigned long long)a3;
- (struct CGPoint { double x0; double x1; })_contentOffsetForScrollingToSection:(long long)a0;
- (struct CGPoint { double x0; double x1; })_contentOffsetFromProposedContentOffset:(struct CGPoint { double x0; double x1; })a0 forScrollingToItemAtIndexPath:(id)a1 atScrollPosition:(unsigned long long)a2;
- (id)_decorationViewForLayoutAttributes:(id)a0;
- (void)_didFinishLayoutTransitionAnimations:(BOOL)a0;
- (BOOL)_disablesDoubleSidedAnimations;
- (id)_dynamicAnimator;
- (struct CGSize { double x0; double x1; })_fallbackItemSize;
- (id)_finalLayoutAttributesForDisappearingItemAtIndexPath:(id)a0;
- (void)_finalizeCollectionViewItemAnimations;
- (void)_finalizeLayoutTransition;
- (struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })_frameForInsertionIndicatorForTargetFrame:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0 axis:(unsigned long long)a1 edges:(unsigned long long)a2;
- (id)_indexPathForInsertionIndicatorForTargetAttributes:(id)a0 axis:(unsigned long long)a1 edges:(unsigned long long)a2 previousAttributes:(id)a3 nextAttributes:(id)a4;
- (id)_indexPathsToDeleteForDecorationViewOfKind:(id)a0;
- (id)_indexPathsToDeleteForSupplementaryViewOfKind:(id)a0;
- (id)_indexPathsToInsertForDecorationViewOfKind:(id)a0;
- (id)_indexPathsToInsertForSupplementaryViewOfKind:(id)a0;
- (BOOL)_initialAppearingLayoutAttributesCanBeOverriddenForEstimatedSizing;
- (id)_initialLayoutAttributesForAppearingItemAtIndexPath:(id)a0;
- (void)_invalidateLayoutUsingContext:(id)a0;
- (id)_invalidationContextForBoundsChange:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0 fromOldBounds:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a1;
- (id)_invalidationContextForEndingReorderingItemToFinalIndexPaths:(id)a0 previousIndexPaths:(id)a1 reorderingCancelled:(BOOL)a2;
- (id)_invalidationContextForRefreshingVisibleElementAttributes;
- (id)_invalidationContextForReorderingTargetPosition:(struct CGPoint { double x0; double x1; })a0 targetIndexPaths:(id)a1 withPreviousPosition:(struct CGPoint { double x0; double x1; })a2 previousIndexPaths:(id)a3;
- (id)_layoutAttributesForElementsInProjectedRect:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a0 withProjectionVector:(struct CGVector { double x0; double x1; })a1 projectionDistance:(double)a2;
- (id)_layoutAttributesForInsertionIndicatorAtItemWithTargetAttributes:(id)a0 targetPositionEdges:(unsigned long long)a1;
- (id)_layoutAttributesForInsertionIndicatorAtTargetIndexPath:(id)a0;
- (id)_layoutAttributesForInsertionIndicatorAtTargetPosition:(struct CGPoint { double x0; double x1; })a0 sourceIndexPath:(id)a1;
- (id)_layoutAttributesForItemNearestPosition:(struct CGPoint { double x0; double x1; })a0 maximumDistance:(double)a1;
- (id)_layoutAttributesForNextItemInDirection:(struct CGPoint { double x0; double x1; })a0 fromIndexPath:(id)a1 constrainedToRect:(struct CGRect { struct CGPoint { double x0; double x1; } x0; struct CGSize { double x0; double x1; } x1; })a2;
- (id)_layoutAttributesForReorderedItemAtIndexPath:(id)a0 withTargetPosition:(struct CGPoint { double x0; double x1; })a1;
- (unsigned long long)_layoutAxisForAttributes:(id)a0 previousAttributes:(id)a1 nextAttributes:(id)a2;
- (BOOL)_needsRecomputeOfPreferredAttributesForVisibleEstimatedItemsDuringUpdate;
- (id)_nextLayoutAttributesForGlobalIndex:(long long)a0;
- (struct CGPoint { double x0; double x1; })_offsetInTopParentLayout:(id *)a0;
- (struct UIEdgeInsets { double x0; double x1; double x2; double x3; })_preferredLayoutMargins;
- (void)_prepareForCollectionViewUpdates:(id)a0 animated:(BOOL)a1;
- (void)_prepareForTransitionFromLayout:(id)a0;
- (void)_prepareToAnimateFromCollectionViewItems:(id)a0 atContentOffset:(struct CGPoint { double x0; double x1; })a1 toItems:(id)a2 atContentOffset:(struct CGPoint { double x0; double x1; })a3;
- (id)_previousLayoutAttributesForGlobalIndex:(long long)a0;
- (id)_reorderingTargetItemIndexPathForPosition:(struct CGPoint { double x0; double x1; })a0 withPreviousIndexPath:(id)a1;
- (void)_setCollectionViewBoundsSize:(struct CGSize { double x0; double x1; })a0;
- (void)_setDynamicAnimator:(id)a0;
- (void)_setExternalObjectTable:(id)a0 forNibLoadingOfDecorationViewOfKind:(id)a1;
- (void)_setWantsRightToLeftHorizontalMirroringIfNeeded:(BOOL)a0;
- (BOOL)_supportsAdvancedTransitionAnimations;
- (BOOL)_wantsRightToLeftHorizontalMirroringIfNeeded;
- (long long)developmentLayoutDirection;
- (id)finalLayoutAttributesForDisappearingSupplementaryElementOfKind:(id)a0 atIndexPath:(id)a1;
- (void)finalizeAnimatedBoundsChange;
- (void)finalizeCollectionViewUpdates;
- (void)finalizeLayoutTransition;
- (BOOL)flipsHorizontallyInOppositeLayoutDirection;
- (id)initialLayoutAttributesForAppearingDecorationElementOfKind:(id)a0 atIndexPath:(id)a1;
- (id)initialLayoutAttributesForAppearingSupplementaryElementOfKind:(id)a0 atIndexPath:(id)a1;
- (id)invalidationContextForEndingInteractiveMovementOfItemsToFinalIndexPaths:(id)a0 previousIndexPaths:(id)a1 movementCancelled:(BOOL)a2;
- (id)invalidationContextForInteractivelyMovingItems:(id)a0 withTargetPosition:(struct CGPoint { double x0; double x1; })a1 previousIndexPaths:(id)a2 previousPosition:(struct CGPoint { double x0; double x1; })a3;
- (void)prepareForCollectionViewUpdates:(id)a0;
- (void)prepareForTransitionToLayout:(id)a0;
- (void)registerClass:(Class)a0 forDecorationViewOfKind:(id)a1;
- (void)registerNib:(id)a0 forDecorationViewOfKind:(id)a1;
- (id)snapshottedLayoutAttributeForItemAtIndexPath:(id)a0;
- (struct CGPoint { double x0; double x1; })targetContentOffsetForProposedContentOffset:(struct CGPoint { double x0; double x1; })a0;
- (struct CGPoint { double x0; double x1; })targetContentOffsetForProposedContentOffset:(struct CGPoint { double x0; double x1; })a0 withScrollingVelocity:(struct CGPoint { double x0; double x1; })a1;
- (id)targetIndexPathForInteractivelyMovingItem:(id)a0 withPosition:(struct CGPoint { double x0; double x1; })a1;
- (struct CGPoint { double x0; double x1; })transitionContentOffsetForProposedContentOffset:(struct CGPoint { double x0; double x1; })a0 keyItemIndexPath:(id)a1;

@end