diff -r cf08b64e87da -r 7c2d6da61646 src/share/classes/com/sun/tools/javac/api/Formattable.java
--- a/src/share/classes/com/sun/tools/javac/api/Formattable.java	Mon Jul 27 15:20:03 2009 -0700
+++ b/src/share/classes/com/sun/tools/javac/api/Formattable.java	Mon Jul 27 19:52:42 2009 -0700
@@ -31,6 +31,11 @@
  * This interface must be implemented by any javac class that has non-trivial
  * formatting needs (e.g. where toString() does not apply because of localization).
  *
+ * <p><b>This is NOT part of any API supported by Sun Microsystems.
+ * If you write code that depends on this, you do so at your own risk.
+ * This code and its internal interfaces are subject to change or
+ * deletion without notice.</b>
+ *
  * @author Maurizio Cimadamore
  */
 public interface Formattable {