public void remove(T obj) throws SwarmException {
remove(obj.getTypeId());
}
/**
* Adds an object to the set.
*
* @param obj the object //TODO , its id or its specifier.
*/
public void add(T obj) throws SwarmException {
final TypeIdSpec key_spec = obj.getTypeId();
JsonObject changes = new JsonObject();
changes.set(key_spec.toString(), TRUE);
change(changes);
}