--- a/UndefinedObject.st	Thu Oct 16 13:17:03 1997 +0200
+++ b/UndefinedObject.st	Tue Oct 21 19:44:59 1997 +0200
@@ -425,13 +425,19 @@
 !
 
 isNil
-    "return true if I am nil - since I am, return true"
+    "return true if I am nil - since I am, return true.
+     Notice:
+	This method is open coded (inlined) by the compiler(s)
+	- redefining it may not work as expected."
 
     ^ true
 !
 
 notNil
-    "return true if I am not nil - since I am nil, return false"
+    "return true if I am not nil - since I am nil, return false.
+     Notice:
+	This method is open coded (inlined) by the compiler(s)
+	- redefining it may not work as expected."
 
     ^ false
 !
@@ -446,6 +452,6 @@
 !UndefinedObject class methodsFor:'documentation'!
 
 version
-    ^ '$Header: /cvs/stx/stx/libbasic/UndefinedObject.st,v 1.31 1997-06-03 10:02:52 cg Exp $'
+    ^ '$Header: /cvs/stx/stx/libbasic/UndefinedObject.st,v 1.32 1997-10-21 17:44:59 cg Exp $'
 ! !
 UndefinedObject initialize!