update docstring

nucleic · Jan 9, 2014 · 5c3209b · 5c3209b
1 parent 4dfe2de
commit 5c3209b
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/enaml/layout/constrainable.py b/enaml/layout/constrainable.py
@@ -19,6 +19,10 @@ class Constrainable(object):
     `width`, `height`, `v_center` and `h_center` attributes which
     are instances of 'LinearSymbolic'.
 
+    It must also provide 'hug_width', 'hug_height', 'resist_width',
+    'resist_height', 'limit_width', and 'limit_height' attributes
+    which are valid PolicyEnum values.
+
     """
     __metaclass__ = ABCMeta