small fix to make analyzer happy

R=nbosch@google.com Review URL: https://codereview.chromium.org//2344893007 .
dart-lang · Sep 16, 2016 · 7582c7e · 7582c7e
1 parent b37c7e4
commit 7582c7e
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/lib/shelf_io.dart b/lib/shelf_io.dart
@@ -116,8 +116,8 @@ Request _fromHttpRequest(HttpRequest request) {
     headers[k] = v.join(',');
   });
 
-  onHijack(callback) {
-    return request.response
+  void onHijack(callback) {
+    request.response
         .detachSocket(writeHeaders: false)
         .then((socket) => callback(socket, socket));
   }