@SafeVarargs public final void addAll(final T... items){
synchronized (mLock) {
    Collections.addAll(mList,items);
  }
  notifyDataSetChanged();
}

@ SafeVarargs public final void addAll ( final T ... items ) { synchronized ( mLock ) { Collections . addAll ( mList , items ) ; } notifyDataSetChanged ( ) ; }
adds the specified items at the end of the array .
