Method operator!=

src/fl/stl/chrono.h:155–157

        return mDuration.count() == rhs.mDuration.count();
    }
    constexpr bool operator!=(const time_point& rhs) const FL_NOEXCEPT {
        return mDuration.count() != rhs.mDuration.count();
    }

    /// Subtract two time_points to get a duration
    constexpr Duration operator-(const time_point& rhs) const FL_NOEXCEPT {