--- a/src/pyams_content/features/preview/interfaces.py	Mon May 28 16:33:44 2018 +0200
+++ b/src/pyams_content/features/preview/interfaces.py	Mon May 28 16:37:13 2018 +0200
@@ -26,3 +26,7 @@
 
     This interface is used to mark contents which can handle preview.
     """
+
+
+class IPreviewView(Interface):
+    """Preview view marker interface"""