diff --git a/functions.go b/functions.go
index 7e1be76..2c860ad 100644
--- a/functions.go
+++ b/functions.go
@@ -44,3 +44,7 @@ func (m *MutexFunction) Call(data interface{}) error {
 	})
 	return nil
 }
+
+func (m *MutexFunction) WaitUntilIdle() {
+	m.dispatcher.WaitUntilIdle()
+}
\ No newline at end of file