--- a/UninterpretedBytes.st	Tue Apr 02 18:02:49 2019 +0200
+++ b/UninterpretedBytes.st	Tue Apr 02 20:31:03 2019 +0200
@@ -5142,6 +5142,22 @@
     ^ 0
 !
 
+isAllocated
+    "for compatibility with ExternalBytes"
+    
+    ^ true
+
+    "Created: / 02-04-2019 / 20:30:50 / Claus Gittinger"
+!
+
+isNull
+    "for compatibility with ExternalBytes"
+    
+    ^ false
+
+    "Created: / 02-04-2019 / 20:30:45 / Claus Gittinger"
+!
+
 isValidUTF8
     "returns true, if the receiver contains a valid UTF8 encoded string"