From 12027d94431ed078c4b4c8beed6674b53efd41ef Mon Sep 17 00:00:00 2001
From: Alexander Telegin <drinkius@users.noreply.github.com>
Date: Tue, 26 May 2020 21:06:19 +0300
Subject: [PATCH] Update Swift collection view interop example (#1837)

* Update uicollectionviewinterop.md
---
 docs/_docs/uicollectionviewinterop.md | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/docs/_docs/uicollectionviewinterop.md b/docs/_docs/uicollectionviewinterop.md
index a918a0cf8..d1f9fb668 100755
--- a/docs/_docs/uicollectionviewinterop.md
+++ b/docs/_docs/uicollectionviewinterop.md
@@ -71,7 +71,14 @@ For this example, the data source method `collectionNode:nodeBlockForItemAtIndex
   </pre>
 
   <pre lang="swift" class = "swiftCode hidden">
-  // Click the "Edit on GitHub" button at the bottom of this 
+  // Setting the return type to implicitly unwrapped optional
+  // helps overcome compiler error when trying to return nil
+  func collectionNode(_ collectionNode: ASCollectionNode,
+                        nodeBlockForItemAt indexPath: IndexPath) -> ASCellNodeBlock! {
+        return optionalNode
+    }
+
+  // Click the "Edit on GitHub" button at the bottom of this  
   // page to contribute the swift code for this section. Thanks!
   </pre>
 </div>