src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/annotations/Function.java

*** 58,63 ****
--- 58,68 ----
  
      /**
       * @return where this function lives.
       */
      public Where where() default Where.PROTOTYPE;
+ 
+     /**
+      * @return return the documentation string for this function.
+      */
+     public String documentation() default "";
  }