diff --git a/action.go b/action.go
index a2cdee8..e6311f9 100644
--- a/action.go
+++ b/action.go
@@ -44,6 +44,7 @@ type Action struct {
 	Expand bool
 
 	TablePB []byte // a table protobuf
+	WidgetPB []byte // a tree of widgets
 }
 
 type ActionType int // Add, SetText, Click, Hide, Append, Delete, etc