public override int countIdentifierReferences(string id)
{
int occurrences = 0;
if (id.Equals(completable.getId(), StringComparison.InvariantCultureIgnoreCase))
{
++occurrences;
}
return(startDataControl.countIdentifierReferences(id) + endDataControl.countIdentifierReferences(id) + progressDataControl.countIdentifierReferences(id) + occurrences);
}