Configured by overriding protected methods:
protected void printComment(Comment comment, Writer out, int indentLevel)
throws IOException {}
protected void printProcessingInstruction(ProcessingInstruction pi, Writer out,
int indentLevel) throws IOException {}
protected void printDeclaration(Document doc, Writer out, String encoding)
throws IOException {}
protected void printDocType(DocType docType, Writer out) throws IOException {}
protected void printElement(Element element, Writer out, int indentLevel)
throws IOException
protected void printEntity(Entity entity, Writer out) throws IOException {}
protected void printNamespace(Namespace ns, Writer out) throws IOException {}
protected void printAttributes(List attributes, Writer out) throws IOException {}