--- a/AbstractHierarchicalItem.st	Thu May 30 09:44:26 2019 +0200
+++ b/AbstractHierarchicalItem.st	Fri Jun 07 13:51:52 2019 +0200
@@ -1592,6 +1592,9 @@
 !
 
 synchronized:aBlock
+    "evaluate aBlock synchronized, i.e. use a monitor for this object;
+     return the value from aBlock"
+
     |model|
 
     (model := self model) notNil ifTrue:[
@@ -1604,6 +1607,7 @@
     "Created: / 28-07-2018 / 13:58:54 / Claus Gittinger"
     "Modified: / 29-07-2018 / 21:02:22 / Stefan Vogel"
     "Modified: / 21-12-2018 / 20:01:54 / Claus Gittinger"
+    "Modified (comment): / 07-06-2019 / 13:51:36 / Claus Gittinger"
 ! !
 
 !AbstractHierarchicalItem methodsFor:'private-displaying'!