throw new IllegalArgumentException("model Data must not be null");
}
mList = list;
}
public void updateDataSet(List<Song> list) {
<BUG>this.mList = list;
}</BUG>
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
if (viewType == FIRST_ITEM)

throw new IllegalArgumentException("model Data must not be null");
}
mList = list;
}
public void updateDataSet(List<Song> list) {
this.mList = list;
notifyDataSetChanged();
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
if (viewType == FIRST_ITEM)
