From 5558b8768b1eddedb7364cf90c12aa1a36e068c4 Mon Sep 17 00:00:00 2001
From: Ahmed Ashour <asashour@yahoo.com>
Date: Tue, 19 Sep 2017 18:30:13 +0200
Subject: Use interface not Implementation, as method parameter

---
 server/src/main/java/com/vaadin/ui/UI.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'server/src/main')

diff --git a/server/src/main/java/com/vaadin/ui/UI.java b/server/src/main/java/com/vaadin/ui/UI.java
index 420e349305..19e0420fd7 100644
--- a/server/src/main/java/com/vaadin/ui/UI.java
+++ b/server/src/main/java/com/vaadin/ui/UI.java
@@ -263,7 +263,7 @@ public abstract class UI extends AbstractSingleComponentContainer
 
         @Override
         public void windowOrderChanged(
-                HashMap<Integer, Connector> windowOrders) {
+                Map<Integer, Connector> windowOrders) {
             Map<Integer, Window> orders = new LinkedHashMap<>();
             for (Entry<Integer, Connector> entry : windowOrders.entrySet()) {
                 if (entry.getValue() instanceof Window) {
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