Is there an exact description of the order of the grid callback events?

I assumed the following order:

1. beforeRequest
2. loadBeforeSend
3. serializeGridData
4. loadComplete / loadError
5. gridComplete

BUT after adding debugging statements into my code I discovered the following behaviour
… that gridComplete is fired before loadComplete … is this correct? why?

I thought that loadComplete is directly called after the XHR returned and gridComplete is the last event called (after rendering the grid)

Please tell me the order of the events I can rely on