itemType = ItemType.aggr;
break;
case L :
Prefices prefices = Adapter.getPrefices(abstractSignature, constructor.getTypList());
Fields fields = Adapter.getFields(abstractSignature, constructor.getFields());
itemDefinition = new Structure(locusList, prefices, fields);
itemType = ItemType.struct;
break;
case U :
type = Adapter.getType(abstractSignature, constructor.getTypList().getFirst());
itemDefinition = new Selector(locusList, type);