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

@@ -58,6 +58,11 @@
 
     /**
      * @return where this function lives.
      */
     public Where where() default Where.PROTOTYPE;
+
+    /**
+     * @return return the documentation string for this function.
+     */
+    public String documentation() default "";
 }