Method ValueChanged

FastCopy/DependentValue.cpp:30–33

        m_valueChanged(*this, value);
    }
    winrt::event_token DependentValue::ValueChanged(winrt::Windows::Foundation::EventHandler<double> const& handler)
    {
        return m_valueChanged.add(handler);
    }
    void DependentValue::ValueChanged(winrt::event_token const& token)
    {
        m_valueChanged.remove(token);