public void addUris(Collection<URI> uris) {
addUris(uris, size());
}
public void addUris(Collection<URI> uris, int at) {
int _at = at;
<BUG>if (_at < 0)             _at = 0;
if (_at > size()) _at = size();</BUG>
List<PlaylistItem> l = new ArrayList<>();
uris.forEach(uri->l.add(new PlaylistItem(uri)));
addPlaylist(l, _at);

public void addUris(Collection<URI> uris) {
addUris(uris, size());
}
public void addUris(Collection<URI> uris, int at) {
int _at = at;
if (_at < 0)      _at = 0;
if (_at > size()) _at = size();
List<PlaylistItem> l = new ArrayList<>();
uris.forEach(uri->l.add(new PlaylistItem(uri)));
addPlaylist(l, _at);
