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trait PriorityTree {
type Node <: BasicTreeNode;
val top = initTree;
top.next = (initTree);
top.next.prev = (top);
def initTree : Node;
trait BasicTreeNode {
private[PriorityTree] var next : Node = _;
private[PriorityTree] var prev : Node = _;
private[PriorityTree] var chld : Node = _;
//var next : Node = _;
//var prev : Node = _;
//var chld : Node = _;
}
}
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