text: //******************************************************************************
  //
  // Copyright (c) 2016 Microsoft Corporation. All rights reserved.
  //
  // This code is licensed under the MIT License (MIT).
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  //
  //******************************************************************************
  
  #pragma once
  
  #import <UIKit/UIKitExport.h>
  #import <CoreGraphics/CGGeometry.h>
  
  @class UIGestureRecognizer;
  @protocol UIViewControllerPreviewingDelegate;
  @class UIView;
  
  @protocol UIViewControllerPreviewing <NSObject>
  @property (nonatomic) CGRect sourceRect;
  @property (nonatomic, readonly) UIGestureRecognizer* previewingGestureRecognizerForFailureRelationship;
  @property (nonatomic, readonly) id<UIViewControllerPreviewingDelegate> delegate;
  @property (nonatomic, readonly) UIView* sourceView;
  @end
  