public override KeyValuePair <double, string> CompareSrc(Source source1, Source source2)
{
var res = Loader.Call(source1.GetRawBytesNullTerminated(), source2.GetRawBytesNullTerminated());
int idx = res.IndexOf(' ');
return(new KeyValuePair <double, string>(res.Substring(0, idx).ParseAsDouble(), res.Substring(idx + 1).Trim()));
}