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-rw-r--r--server/src/main/java/com/vaadin/event/CollapseEvent.java1
-rw-r--r--server/src/main/java/com/vaadin/event/ExpandEvent.java1
2 files changed, 2 insertions, 0 deletions
diff --git a/server/src/main/java/com/vaadin/event/CollapseEvent.java b/server/src/main/java/com/vaadin/event/CollapseEvent.java
index ba740142e3..f0ba6d1907 100644
--- a/server/src/main/java/com/vaadin/event/CollapseEvent.java
+++ b/server/src/main/java/com/vaadin/event/CollapseEvent.java
@@ -79,6 +79,7 @@ public class CollapseEvent<T> extends Component.Event {
*
* @param <T>
* the collapsed item's type
+ * @since 8.1
*/
@FunctionalInterface
public interface CollapseListener<T> extends Serializable {
diff --git a/server/src/main/java/com/vaadin/event/ExpandEvent.java b/server/src/main/java/com/vaadin/event/ExpandEvent.java
index 775c368a12..ce11bd4d8c 100644
--- a/server/src/main/java/com/vaadin/event/ExpandEvent.java
+++ b/server/src/main/java/com/vaadin/event/ExpandEvent.java
@@ -78,6 +78,7 @@ public class ExpandEvent<T> extends Component.Event {
*
* @param <T>
* the expanded item's type
+ * @since 8.1
*/
@FunctionalInterface
public interface ExpandListener<T> extends Serializable {