*/
private static void createKeyElements()
{
HashMap<String, mxGraphMlKey> keyMap = mxGraphMlKeyManager.getInstance()
.getKeyMap();
mxGraphMlKey keyNode = new mxGraphMlKey(mxGraphMlConstants.KEY_NODE_ID,
mxGraphMlKey.keyForValues.NODE, mxGraphMlConstants.KEY_NODE_NAME,
mxGraphMlKey.keyTypeValues.STRING);
keyMap.put(mxGraphMlConstants.KEY_NODE_ID, keyNode);
mxGraphMlKey keyEdge = new mxGraphMlKey(mxGraphMlConstants.KEY_EDGE_ID,
mxGraphMlKey.keyForValues.EDGE, mxGraphMlConstants.KEY_EDGE_NAME,
mxGraphMlKey.keyTypeValues.STRING);
keyMap.put(mxGraphMlConstants.KEY_EDGE_ID, keyEdge);
mxGraphMlKeyManager.getInstance().setKeyMap(keyMap);
}