text: #import <Foundation/Foundation.h>
  #import <QuartzCore/QuartzCore.h>
  #import "CALayerWithClipRender.H"
  
  /*!
   * Overrides Apple's CALayer purely to change one method, so that hit-testing
   * is done by checking whether the hit point lies:
   *
   *  "inside ANY of my child sub-layers (some of which have over-ridden hit-testing too)"
   *
   * This implementation is used by SVGGElement (for obvious reasons!)
   *
   * This is more useful than Apple's default implementation, but it might cause unexpected
   * problems in other code (not that I'm aware of any - this override appears to be a common
   * implementation, c.f. http://stackoverflow.com/questions/2944064/hit-testing-with-calayer-using-the-alpha-properties-of-the-calayer-contents
   */
  @interface CALayerWithChildHitTest : CALayerWithClipRender {
      
  }
  
  @end
  