* @param name name of a group.
* @return true when the name is defined as a group, or false.
*/
public boolean isGroupName(String name)
{
Group grp = makeGroup(name);
List<Entry> entryList = cfg_.getAllEntries(grp);
/* When the name is defined but the group is empty,
the group name is invalid for us. */
return entryList.isEmpty() == false;