private DefaultMutableTreeNode createNode(Header header) {
DefaultMutableTreeNode node = new DefaultMutableTreeNode(
new ObjectWrapper("Header", header));
for (Iterator it = header.getFields().iterator(); it.hasNext();) {
Field field = (Field) it.next();
String name = field.getName();
node.add(new DefaultMutableTreeNode(new ObjectWrapper(name, field)));
}
return node;