FormatCacheType & format_cache = it1->second.cache;
FormatCacheType::iterator const it2 = format_cache.find(format);
if (it2 == format_cache.end())
FormatCacheType & format_cache = it1->second.cache;
FormatCacheType::iterator const it2 = format_cache.find(format);
if (it2 == format_cache.end())