}
if (data instanceof GroupHeader)
{
final Group g = (Group) parent;
final GroupHeader oldHeader = g.getHeader();
final GroupHeader newHeader = new GroupHeader();
g.setHeader(newHeader);
return new SectionEditUndoEntry(g.getObjectID(), ModelUtility.findIndexOf(g, newHeader), oldHeader, newHeader);
}
if (data instanceof GroupFooter)
{