text: /**
   * Copyright (c) 2016-present, Facebook, Inc.
   * All rights reserved.
   *
   * This source code is licensed under the BSD-style license found in the
   * LICENSE file in the root directory of this source tree. An additional grant
   * of patent rights can be found in the PATENTS file in the same directory.
   */
  
  #import <UIKit/UIKit.h>
  
  #import <IGListKit/IGListAdapterUpdaterDelegate.h>
  #import <IGListKit/IGListExperiments.h>
  #import <IGListKit/IGListMacros.h>
  #import <IGListKit/IGListUpdatingDelegate.h>
  
  NS_ASSUME_NONNULL_BEGIN
  
  /**
   An `IGListAdapterUpdater` is a concrete type that conforms to `IGListUpdatingDelegate`.
   It is an out-of-box updater for `IGListAdapter` objects to use.
  
   @note This updater performs re-entrant, coalesced updating for a list. It also uses a least-minimal diff 
   for calculating UI updates when `IGListAdapter` calls 
   `-performUpdateWithCollectionView:fromObjects:toObjects:completion:`.
   */
  IGLK_SUBCLASSING_RESTRICTED
  NS_SWIFT_NAME(ListAdapterUpdater)
  @interface IGListAdapterUpdater : NSObject <IGListUpdatingDelegate>
  
  /**
   The delegate that receives events with data on the performance of a transition.
   */
  @property (nonatomic, weak) id<IGListAdapterUpdaterDelegate> delegate;
  
  /**
   A flag indicating if a move should be treated as a "delete, then insert" operation.
   */
  @property (nonatomic, assign) BOOL movesAsDeletesInserts;
  
  /**
   A flag indicating whether this updater should skip diffing and simply call
   `reloadData` for updates when the collection view is not in a window. The default value is `YES`.
   
   @note This will result in better performance, but will not generate the same delegate
   callbacks. If using a custom layout, it will not receive `prepareForCollectionViewUpdates:`.
  
   @warning On iOS < 8.3, this behavior is unsupported and will always be treated as `NO`.
   */
  @property (nonatomic, assign) BOOL allowsBackgroundReloading;
  
  /**
   A bitmask of experiments to conduct on the updater.
   */
  @property (nonatomic, assign) IGListExperiment experiments;
  
  @end
  
  NS_ASSUME_NONNULL_END
  