/// is there a change within the given range ?
bool isChanged(lyx::pos_type start, lyx::pos_type end) const;
/// is there a non-addition in this range ?
bool isChangeEdited(lyx::pos_type start, lyx::pos_type end) const;
/// is there a change within the given range ?
bool isChanged(lyx::pos_type start, lyx::pos_type end) const;
/// is there a non-addition in this range ?
bool isChangeEdited(lyx::pos_type start, lyx::pos_type end) const;