Link getLinkToNode(Node toNode) {
if (!toNodes.containsKey(toNode)) {
toNodes.put(toNode, getNewLink(myNode, toNode));
}
return toNodes.get(toNode);
}
Link getLinkFromNode(Node fromNode) {
if (!fromNodes.containsKey(fromNode)) {
fromNodes.put(fromNode, getNewLink(fromNode, myNode));
}
return fromNodes.get(fromNode);
}