protected override void Dispose(bool disposing)
 {
     if (disposing)
     {
         _parentRenderer = null;
     }
     base.Dispose(disposing);
 }
 protected override void Dispose(bool disposing)
 {
     base.Dispose(disposing);
     if (disposing)
     {
         _parent = null;
     }
 }
 public GridCollectionItemDecoration(GridCollectionViewRenderer parentRenderer)
 {
     _parentRenderer = parentRenderer;
 }
 public CollectionViewSpanSizeLookup(GridCollectionViewRenderer parent)
 {
     _parent = parent;
     SpanIndexCacheEnabled = false;
 }