docs: public boolean addAll(final int index, final int[] elements) {
  		addRangeCheck(index);
  
  		final int count = elements.length;
  		ensureSize(_size + count);
  
  		final int moved = _size - index;
  		if (moved > 0) {
  			arraycopy(_data, index, _data, index + count, moved);
  		}
  
  		arraycopy(elements, 0, _data, index, count);
  		_size += count;
  		return count != 0;
  	}