public String toString() {
StringBuilder buffer = new StringBuilder(64);
for (int i = 0, n = tracks.size; i < n; i++) {
TrackEntry entry = tracks.get(i);
if (entry == null) continue;
if (buffer.length() > 0) buffer.append(", ");
buffer.append(entry.toString());
}
if (buffer.length() == 0) return "<none>";
return buffer.toString();
}
