b.characters("world");
b.retain(2);
b.deleteCharacters("cd");
b.elementStart("a", Attributes.EMPTY_MAP);
b.characters("hEllo");
b.elementStart("b", new AttributesImpl("a", "1"));
b.characters("world");
b.elementStart("B", new AttributesImpl("A", "1", "b", "abc12"));
b.elementEnd();
// A non-ASCII Unicode character.
b.characters("\u2603");