code: protected void performOutgoingBehavior(ExecutionEntity execution,
                                             boolean checkConditions,
                                             boolean throwExceptionIfExecutionStuck) {
          Context.getAgenda().planTakeOutgoingSequenceFlowsOperation(execution,
                                                                     true);
      }
docs: Actual implementation of leaving an activity.
  @param execution The current execution context
  @param checkConditions Whether or not to check conditions before determining whether or not to take a transition.
  @param throwExceptionIfExecutionStuck If true, an {@link ActivitiException} will be thrown in case no transition could be found to leave the activity.