The activity operation state. This enumeration contains the same states as ActivityState,
but contains three additional operational states. These additional states indicates that
the activity is not yet in the set activity state but operations are in progress to set the activity
to that state.
The object is active but locked.
New cases can not be started and suspended task's can not be resumed.
Requests are answered with a 503 Service Unavailable error if they want to resumed a task or start a new case.
Requests to resumed task are handled normally.
This public API is available in IvyScript and Java. It has the visibility EXPERT.