--- old/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/api/tree/FunctionExpressionTree.java	2018-06-27 09:02:11.000000000 +0530
+++ new/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/api/tree/FunctionExpressionTree.java	2018-06-27 09:02:11.000000000 +0530
@@ -41,8 +41,12 @@
  *   <em>var</em> func = <em>(x) =&gt; x+1</em>
  * </pre>
  *
+ * @deprecated Nashorn JavaScript script engine and APIs, and the jjs tool
+ * are deprecated with the intent to remove them in a future release.
+ *
  * @since 9
  */
+@Deprecated(since="11", forRemoval=true)
 public interface FunctionExpressionTree extends ExpressionTree {
     /**
      * Returns the name of the function being declared.