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/private.py

@@ -250,7 +250,7 @@ class PrivateProxyDb(ProxyDbBase):
         obj = self.get_unfiltered_place(handle)
         return obj and not obj.get_privacy()
     
-    def include_object(self, handle):
+    def include_media_object(self, handle):
         """
         Predicate returning True if object is to be included, else False
         """