--- a/FilteringStream.st	Thu Mar 24 13:59:20 2016 +0100
+++ b/FilteringStream.st	Fri Mar 25 16:44:11 2016 +0100
@@ -452,6 +452,8 @@
 !
 
 isWritable
+    "return true, if writing is supported by the receiver."
+
     ^ outputStream notNil and:[outputStream isWritable]
 !