1 files changed, 1 insertions, 0 deletions
diff --git a/structs.go b/structs.go
index f96158d..cfd21db 100644
--- a/structs.go
+++ b/structs.go
@@ -31,6 +31,7 @@ type TreeInfo struct {
 	SetTitle   func(*Node, string)
 	SetLabel   func(*Node, string)
 	SetChecked func(*Node, bool)
+	ToolkitClose func()
 }
 
 type Node struct {