diff -r d58698c455c1 -r f129a3fcd113 Object.st
--- a/Object.st	Fri May 26 21:24:42 2017 +0100
+++ b/Object.st	Fri Feb 17 10:25:31 2017 +0100
@@ -10054,6 +10054,15 @@
     "Created: / 04-09-2011 / 20:04:43 / cg"
 !
 
+isURL
+    "Return true if the receiver is a url.
+     Note: Do not override in any class except URL."
+
+    ^ false
+
+    "Created: / 17-02-2017 / 10:25:12 / cg"
+!
+
 isUUID
     "Return true if the receiver is a uuid.
      Note: Do not override in any class except UUID."