static public ITEM_TYPE AddAndGet <LABEL_TYPE, ITEM_TYPE>(this LabeledItemSet <LABEL_TYPE, ITEM_TYPE> item, ITEM_TYPE to_add) where ITEM_TYPE : LabeledItem <LABEL_TYPE>
{
item.Add(to_add);
return(to_add);
}
public SignalingContainer_Collection_LabeledItemSet()
{
labeled_item_set = new LabeledItemSet <LABEL_TYPE, ELEMENT_TYPE>();
}