How to mock method returning object using CppUTest

I've following method:

QMap<QString, int> DefaultConfig::getConfig()
{
    QMap<QString, int> result;
    result.insert("Error", LOG_LOCAL0);
    result.insert("Application", LOG_LOCAL1);
    result.insert("System", LOG_LOCAL2);
    result.insert("Debug", LOG_LOCAL3);
    result.insert("Trace", LOG_LOCAL4);
    return result;
}

an I try to write mock which can return QMap prepared in test:

QMap<QString, int> DefaultConfig::getConfig() {
    mock().actualCall("getConfig");
    return ?
}

but I don't know how to mock the return value? I would like to use the mock in following way in TEST function:

QMap<QString, int> fake_map;
fake_map.insert("ABC", 1);
mock().expectOneCall("getConfig").andReturnValue(fake_map);

I cannot find such example in CppUTest Mocking documentation. I also know that .andReturnValue in this form will also not work.