add @since

git-svn-id: https://svn.apache.org/repos/asf/archiva/redback/redback-components/trunk@1430587 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/spring-registry-api/src/main/java/org/apache/archiva/redback/components/registry/Registry.java b/spring-registry-api/src/main/java/org/apache/archiva/redback/components/registry/Registry.java
index 647628c..8069ef5 100644
--- a/spring-registry-api/src/main/java/org/apache/archiva/redback/components/registry/Registry.java
+++ b/spring-registry-api/src/main/java/org/apache/archiva/redback/components/registry/Registry.java
@@ -232,7 +232,7 @@
 
     /**
      * Get all the keys in this registry.
-     *
+     * @since 2.1
      * @return the set of keys
      */
     Collection<String> getFullKeys();