how to trigger bolt stuff from inspector ?

This don't work : https://docs.unity3d.com/2019.3/Documentation/Manual/bolt-events.html

with my OnInspectorGUI code :

Code (CSharp):

1.             if (GUILayout.Button("Make Quad"))
2.             {
3.                 FlowMachine flow = procMesh.GetComponent<FlowMachine>();
4.                 if (flow)
5.                 {
6.                     CustomEvent.Trigger(procMesh.gameObject, "MakeQuad");
7.                 }
8.                 else
9.                 {
10.                     UnityEngine.Debug.LogError("no FlowMachine");
11.                 }
12.             }
13.