clearTracks method
void
clearTracks()
Implementation
void clearTracks() {
final bool oldDrainDisabled = queue.drainDisabled;
queue.drainDisabled = true;
final int n = tracks.length;
for (int i = 0; i < n; i++) {
clearTrack(i);
}
tracks.length = 0;
queue
..drainDisabled = oldDrainDisabled
..drain();
}