| Interface | Description | 
|---|---|
| ActivityInstanceState | 
 Contains a predefined set of states activity instances may be in
 during the execution of a process instance. 
 | 
| AtomicOperation | Deprecated | 
| Class | Description | 
|---|---|
| ActivityInstanceState.ActivityInstanceStateImpl | |
| CompensationBehavior | 
 Contains the oddities required by compensation due to the execution structures it creates. 
 | 
| ExecutionImpl | |
| ExecutionStartContext | |
| InstantiationStack | 
 Expresses that the list of activities should be instantiated and optionally a transition
 afterwards. 
 | 
| LegacyBehavior | 
 This class encapsulates legacy runtime behavior for the process engine. 
 | 
| OutgoingExecution | |
| ProcessInstanceStartContext | 
 Callback for being notified when a model instance has started. 
 | 
| PvmExecutionImpl | 
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