--- a/AbstractFileBrowser.st	Sat Jan 28 02:12:22 2017 +0100
+++ b/AbstractFileBrowser.st	Sat Jan 28 04:11:15 2017 +0100
@@ -2821,6 +2821,12 @@
     ^ CodeExecutionLock new
 ! !
 
+!AbstractFileBrowser class methodsFor:'queries'!
+
+isAbstract
+    ^ self == AbstractFileBrowser
+! !
+
 !AbstractFileBrowser class methodsFor:'resources'!
 
 classResources