sysex = ((XMLPatch) p).sysex;
XMLPatch p = (XMLPatch)_p; sysex = p.sysex; cache = (HashMap) p.cache.clone(); name = p.name;
    public void useSysexFromPatch(IPatch p) {        if (p.getClass() != XMLPatch.class) {            throw new IllegalArgumentException();        }        sysex = ((XMLPatch) p).sysex;    }