QObject::connect(cmbbox, static_cast<void(QComboBox::*)(int)>(&QComboBox::currentIndexChanged), [](int i){});
QObject::connect(cmbbox, QOverload<int>::of(&QComboBox::currentIndexChanged), [](int i){});
QObject::connect(cmbbox, static_cast<void(QComboBox::*)(int)>(&QComboBox::currentIndexChanged), [](int i){});
QObject::connect(cmbbox, QOverload<int>::of(&QComboBox::currentIndexChanged), [](int i){});