1. Implement iter_<object> methods in proxybase.

2. Change include_object to include_media_object to avoid confusion
3. Make _validated_id_prefix method in read.py a staticmethod
4. Use new iter_<objects> methods in Records.py, StatsgGramplet.py, GivenNameGramplet.py, ExtractCity.py and _IsSiblingOfFilterMatch.py as examples

svn: r13151

src/gen/proxy/referenced.py

@@ -59,7 +59,7 @@ class ReferencedProxyDb(ProxyDbBase):
         """
         return handle not in self.unreferenced_places
         
-    def include_object(self, handle):
+    def include_media_object(self, handle):
         """
         Filter for media objects
         """