Method isEmpty

src/selection.h:45–45

    [[nodiscard]] inline LineRef getOldLastLine() const { return oldLastLine; };
    [[nodiscard]] inline LineRef getOldFirstLine() const { return oldFirstLine; };
    [[nodiscard]] inline bool isEmpty() const { return !firstLine.isValid() || (firstLine == lastLine && firstPos == lastPos); }

    void reset()
    {