// right+ctrl->refactor
//     Q_PROPERTY(QString example READ example WRITE setExample NOTIFY exampleChanged)

public slots:
void setExample(int example)
{
    if (m_example == example)
        return;

    m_example = example;
    emit exampleChanged(m_example);
}


// Why not this ?
void setExample(const int &example)
{
    if (m_example != example){
        m_example = example;
        emit exampleChanged(m_example);
    }
}