mP1/walkingkooka-tree#717 Traversable implements CanBeEmpty

- mP1/walkingkooka-tree#717
- Traversable implements CanBeEmpty

src/test/java/walkingkooka/tree/xml/XmlNodeTestCase.java

@@ -323,7 +323,9 @@ public final String isMethodTypeNameSuffix() {
 
     @Override
     public final Predicate<String> isMethodIgnoreMethodFilter() {
-        return (m) -> m.equals("isRoot") || m.equals("parentOrFail");
+        return (m) -> m.equals("isRoot") ||
+                m.equals("parentOrFail") ||
+                m.equals("isEmpty");
     }
 
     // TypeNameTesting.........................................................................................