{
parent.addProperty("tablespaces.tablespace.name", "default");
parent.addProperty("tablespaces.tablespace(-1).name", "test");
parent.addProperty("tables.table(0).var", "${brackets:x}");
ConfigurationInterpolator interpolator = parent.getInterpolator();
interpolator.registerLookup("brackets", new Lookup() {
public String lookup(String key) {
return "(" + key + ")";
}