public CellRangeAddress remove(int rangeIndex) {if (_list.isEmpty()) {throw new RuntimeException("List is empty");}if (rangeIndex < 0 || rangeIndex >= _list.size()) {throw new RuntimeException("Range index (" + rangeIndex+ ") is outside allowable range (0.." + (_list.size()-1) + ")");}return _list.remove(rangeIndex);}