--- a/src/pyams_alchemy/interfaces/__init__.py	Mon Oct 24 10:13:43 2016 +0200
+++ b/src/pyams_alchemy/interfaces/__init__.py	Mon Oct 24 16:59:33 2016 +0200
@@ -76,3 +76,6 @@
 
     def get_engine(self, use_pool=True):
         """Get SQLAlchemy engine"""
+
+    def clear_engine(self):
+        """Remove inner volatile attributes when utility properties are modified"""