--- a/eric7/Graphics/UMLItem.py	Fri May 21 17:54:15 2021 +0200
+++ b/eric7/Graphics/UMLItem.py	Fri May 21 18:01:11 2021 +0200
@@ -253,19 +253,6 @@
         """
         return self.ItemType
     
-    def buildItemDataString(self):
-        """
-        Public method to build a string to persist the specific item data.
-        
-        This string must start with ", " and should be built like
-        "attribute=value" with pairs separated by ", ". value must not
-        contain ", " or newlines.
-        
-        @return persistence data
-        @rtype str
-        """
-        return ""
-    
     def parseItemDataString(self, version, data):
         """
         Public method to parse the given persistence data.