diff --git a/kabuki/actor.py b/kabuki/actor.py
index 22518a7..1595802 100644
--- a/kabuki/actor.py
+++ b/kabuki/actor.py
@@ -46,7 +46,7 @@ class Actor:
     def do_update_cache_size(self, new):
         self.cache.set_size(new)
 
-    def update(self):
+    def update(self): #TODO: check for empty cache?
         self.plt.set(*self.cache)
 
     def __repr__(self):