public void removeEmptyText(JwXmlElement e) {
for (JwXmlNode n : e.getChildren().getShallowCopy())
if (n.isText() && n.asText().isEmpty()) e.removeChild(n);
}
public void normalizeChildren(JwXmlElement e) {
for (JwXmlNode n : e.getChildren()) normalizeNode(n);
}