public void resume() {
synchronized (TimelineEngine.LOCK) {
TimelineScenarioState oldState = this.state;
if (oldState != TimelineScenarioState.SUSPENDED) return;
this.state = this.statePriorToSuspension;
for (TimelineScenarioActor running : this.runningActors) {
if (running instanceof Timeline) {
((Timeline) running).resume();
}
}
}
}
