Add a indexPathForNode: to ASTableView

AsyncDisplayKit/ASTableView.h

@@ -227,6 +227,15 @@
  */
 - (ASCellNode *)nodeForRowAtIndexPath:(NSIndexPath *)indexPath;
 
+/**
+ * Similar to -indexPathForCell:.
+ *
+ * @param cellNode a cellNode part of the table view
+ *
+ * @returns an indexPath for this cellNode
+ */
+- (NSIndexPath *)indexPathForNode:(ASCellNode *)cellNode;
+
 /**
  * Similar to -visibleCells.
  *