| Value | Meaning |
|---|---|
| None"None" | * Engine is totally inactive. |
| Starting"Starting" | * Engine is starting. |
| Started"Started" | * Engine just started. |
| Stopping"Stopping" | * Engine is stopping. |
| Stopped"Stopped" | * Engine just stopped. |
| Running"Running" | * Engine is running. |
| Paused"Paused" | * Engine is paused. |
| ShouldQuit"ShouldQuit" | * Engine is in process of quiting. |
* Engine state enumeration.