src/jdk.scripting.nashorn/share/classes/jdk/nashorn/api/tree/FunctionExpressionTree.java

*** 39,50 ****
--- 39,54 ----
   *
   * <pre>
   *   <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.
       *
       * @return name the function declared