private Collection<EnforceabilityProblem> checkStartEventTypes(
ChoreographySubProcess subProcess) {
Collection<EnforceabilityProblem> problems = new HashSet<EnforceabilityProblem>();
for (ProcessNode node : subProcess.getProcessNodes()) {
if ((node instanceof StartEvent) && !(node.getClass().equals(StartEvent.class))) {
problems.add(new EnforceabilityProblem(DESC_OnlyNoneStartEvents, node, subProcess));
}
}
return problems;
}
