package board.algo;
<BUG>import java.util.Collection;
import board.RoutingBoard;</BUG>
import board.items.BrdItem;
import board.items.BrdTracep;
import board.varie.BrdKeepPoint;

package board.algo;
import java.util.Collection;
import java.util.TreeSet;
import board.RoutingBoard;
import board.items.BrdItem;
import board.items.BrdTracep;
import board.varie.BrdKeepPoint;
