Shuffle & Cleanup Stuff (#3080)

Source/Private/ASMutableElementMap.h

@@ -0,0 +1,50 @@
+//
+//  ASMutableElementMap.h
+//  AsyncDisplayKit
+//
+//  Created by Adlai Holler on 2/23/17.
+//  Copyright © 2017 Facebook. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <AsyncDisplayKit/ASBaseDefines.h>
+#import <AsyncDisplayKit/ASElementMap.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class ASSection, ASCollectionElement;
+
+/**
+ * This mutable version will be removed in the future. It's only here now to keep the diff small
+ * as we port data controller to use ASElementMap.
+ */
+AS_SUBCLASSING_RESTRICTED
+@interface ASMutableElementMap : NSObject <NSCopying>
+
+- (instancetype)init __unavailable;
+
+- (instancetype)initWithSections:(NSArray<ASSection *> *)sections items:(ASCollectionElementTwoDimensionalArray *)items supplementaryElements:(ASSupplementaryElementDictionary *)supplementaryElements;
+
+- (void)insertSection:(ASSection *)section atIndex:(NSInteger)index;
+
+- (void)removeAllSectionContexts;
+
+/// Only modifies the array of ASSection * objects
+- (void)removeSectionContextsAtIndexes:(NSIndexSet *)indexes;
+
+- (void)removeAllElements;
+
+- (void)removeItemsAtIndexPaths:(NSArray<NSIndexPath *> *)indexPaths;
+
+- (void)removeElementsOfKind:(NSString *)kind inSections:(NSIndexSet *)sections;
+
+- (void)insertEmptySectionsOfItemsAtIndexes:(NSIndexSet *)sections;
+
+- (void)insertElement:(ASCollectionElement *)element atIndexPath:(NSIndexPath *)indexPath;
+
+@end
+
+@interface ASElementMap (MutableCopying) <NSMutableCopying>
+@end
+
+NS_ASSUME_NONNULL_END