document.writeElement("g", true);
document.writeId("featureId");
document.writeElement("g", true);
document.writeAttribute("style", "my-super-style:true;");
document.writeId("styleId");
document.closeElement();
document.closeElement();
Assert.assertEquals("<g id=\"featureId\"><g style=\"my-super-style:true;\" id=\"featureId.styleId\"/></g>",
writer.getBuffer().toString());
}