*/
    @CanIgnoreReturnValue
    @Override
    public Builder<E> add(E element) {
      checkNotNull(element);
      copyIfNecessary();
      if (n == elements.length) {
        sortAndDedup();
        /*
         * sortAndDedup may have made enough room for this element, but that's not necessarily good
         * enough. Consider, for example, the case where we have a buffer of size (n+1), add n