Add isItem method.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@19986 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Base.py

@@ -3519,6 +3519,9 @@ class Base( CopyContainer,
     key = ('default_reindex_parameter', id(aq_base(self)))
     return tv.get(key)
 
+  security.declareProtected(Permissions.View, 'isItem' )
+  def isItem(self):
+    return self.portal_type in self.getPortalItemTypeList()
 
 InitializeClass(Base)