public Ark(Node fromNode, int fp, Node toNode, int tp)
{
arcStandIn = null;
from = fromNode;
fromParameter = fp;
to = toNode;
toParameter = tp;
from.addOutputArk(this, fp);
to.addInputArk(this, tp);
}
public void setArkStandIn(ArkStandIn asi)
{
arcStandIn = asi;
}