@Test
    public void testAnnotationIterationForE() {
        //E has no child nodes, should have equal results for recursive and non-recursive iterator
        eIteration(tree.iterator(e));
        eIteration(tree.iteratorRecursive(e));
    }
Tests iterating through E's annotations in a tree.
document/src/test/java/com/yahoo/document/annotation/SpanTreeTestCase.java