/**
* Removes a Nation from the Datasource
*
* @param nation
*/
public boolean removeNation(Nation nation) {
boolean result = nations.remove(nation.getName()) != null;
for (Town t : towns.values()) if (t.hasNation(nation)) t.removeNation(nation);
return result;
}
/**
* Adds a Nation to the Datasource
*
* @param nation
*/
public void addNation(Nation nation) throws Exception {
nations.put(nation.getName(), nation);
}