add @since annotations

1 files changed, 4 insertions, 0 deletions

diff --git a/src/library/scala/collection/mutable/LinkedHashMap.scala b/src/library/scala/collection/mutable/LinkedHashMap.scala
index 193850c405..2649a7b376 100644
--- a/src/library/scala/collection/mutable/LinkedHashMap.scala
+++ b/src/library/scala/collection/mutable/LinkedHashMap.scala
@@ -20,12 +20,16 @@ import Predef._
  *  @author  Matthias Zenger
  *  @author  Martin Odersky
  *  @version 2.8
+ *  @since   2.7
  */
 object LinkedHashMap extends MutableMapFactory[LinkedHashMap] {
   implicit def builderFactory[A, B]: BuilderFactory[(A, B), LinkedHashMap[A, B], Coll] = new MapBuilderFactory[A, B]
   def empty[A, B] = new LinkedHashMap[A, B]
 }
 
+/**
+ * @since 2.7
+ */
 @serializable
 class LinkedHashMap[A, B] extends Map[A, B]
                              with MapLike[A, B, LinkedHashMap[A, B]]