// node: ALIAS | ANCHOR? TAG? (SCALAR|sequence|mapping)
private void parseNode() {
if (scanner.checkToken(Token.ID.Alias)) {
AliasToken token = (AliasToken) scanner.getToken();
events.add(new AliasEvent(token.getValue(), null, null));
} else {
String anchor = null;
if (scanner.checkToken(Token.ID.Anchor)) {
AnchorToken token = (AnchorToken) scanner.getToken();
anchor = token.getValue();