@Override
public Topic fetchPartType(Association assoc) {
Topic partTypeTopic = assoc.getTopic("dm4.core.part_type");
// error check
if (partTypeTopic == null) {
throw new RuntimeException(
"Invalid association definition: topic role dm4.core.part_type "
+ "is missing in "
+ assoc);
}
//
return partTypeTopic;
}
