public void render(RenderContext r) {
List<? extends CssTree> children = children();
TokenConsumer tc = r.getOut();
tc.mark(getFilePosition());
if (!children.isEmpty()) {
tc.mark(children.get(0).getFilePosition());
}
tc.consume(typePrefix());
// Make sure the token consumer sees a single identifier.
tc.consume(suffixedIdentifier(suffix()));
}