Restore unintended API changes (#17645)

This reverts commit 0ae745206a9ebc759a126606621f6cbd9f48b00d and
restores a removed public method.

Change-Id: I8eff9668d0a5c49fb63ecea7b0214e478b0aeee8

1 files changed, 13 insertions, 0 deletions

diff --git a/server/src/com/vaadin/ui/Tree.java b/server/src/com/vaadin/ui/Tree.java
index 3c5758c1ea..a86a9bd64b 100644
--- a/server/src/com/vaadin/ui/Tree.java
+++ b/server/src/com/vaadin/ui/Tree.java
@@ -1301,6 +1301,19 @@ public class Tree extends AbstractSelect implements Container.Hierarchical,
         }
     }
 
+    /**
+     * Tree does not support lazy options loading mode. Setting this true will
+     * throw UnsupportedOperationException.
+     * 
+     * @see com.vaadin.ui.Select#setLazyLoading(boolean)
+     */
+    public void setLazyLoading(boolean useLazyLoading) {
+        if (useLazyLoading) {
+            throw new UnsupportedOperationException(
+                    "Lazy options loading is not supported by Tree.");
+        }
+    }
+
     private ItemStyleGenerator itemStyleGenerator;
 
     private DropHandler dropHandler;