public void clear() {
		List<AbstractTable<?>> tableList = new ArrayList<AbstractTable<?>>(tables.values());
		for (AbstractTable<?> table : tableList) {
			table.clear();
		}
	}
public void clear ( ) { List < AbstractTable < ? > > tableList = new ArrayList < AbstractTable < ? > > ( tables . values ( ) ) ; for ( AbstractTable < ? > table : tableList ) { table . clear ( ) ; } }
Use with care. Removes all content of all tables. Should only
be used for JUnit tests.