Table and collection views' async data source can provide different constrained size per node. And because the size is of type ASSizeRange, it has a min size that is very helpful in many cases..

AsyncDisplayKit/ASCollectionView.h

@@ -261,6 +261,17 @@
 
 @optional
 
+/**
+ * Provides the constrained size range for measuring the node at the index path.
+ *
+ * @param collectionView The sender.
+ *
+ * @param indexPath The index path of the node.
+ *
+ * @returns A constrained size range for layout the node at this index path.
+ */
+- (ASSizeRange)collectionView:(ASCollectionView *)collectionView constrainedSizeForNodeAtIndexPath:(NSIndexPath *)indexPath;
+
 /**
  * Indicator to lock the data source for data fetching in async mode.
  * We should not update the data source until the data source has been unlocked. Otherwise, it will incur data inconsistence or exception