SetLocale
virtual const char* SetLocale(int category,
virtual const char* SetLocale(int category, const char* locale) = 0;
locale = backend->SetLocale(lc, locales[lc]);
return backend->SetLocale(category, NULL);
const char* localeDescription = backend->SetLocale(LC_ALL, NULL);
newBackend->SetLocale(lc, backend->SetLocale(lc, NULL));
locale = gGlobalLocaleBackend->SetLocale(lc, locales[lc]);
return const_cast<char*>(gGlobalLocaleBackend->SetLocale(category, NULL));