public <PSC> void removeVanishObserver(PSC ptn) {
Observer.remove(_names.get(ptn));
_names.remove(ptn);
_vanishOb.remove(ptn);
_state.remove(ptn);
}
public void removeChangeObserver(int threshold) {
Observer.remove(_cnames.get(threshold));
_names.remove(threshold);
_changeOb.remove(new Integer(threshold));
_minChanges = getMinChanges();
}
public <PSC> void removeAppearObserver(PSC ptn) {
Observer.remove(_names.get(ptn));
_names.remove(ptn);
_appearOb.remove(ptn);
_state.remove(ptn);
}