@ -30,6 +30,7 @@ import java.util.regex.Pattern;
public abstract class ValueNode {
public static final NullNode NULL_NODE = new NullNode();
public static final BooleanNode TRUE = new BooleanNode("true");
public static final BooleanNode FALSE = new BooleanNode("false");
public static final UndefinedNode UNDEFINED = new UndefinedNode();