try { } catch (IOException e) {
// TODO Auto-generatedSystem.out(3200): response that has been readed {\rtf1\ansi\ansicpg1252\cocoartf1038\cocoasubrtf360 11-11 11:30:57.789: I/System.out(3200): {\fonttbl\f0\fmod
add(auto a, auto b); // the decltype(a) is needed to make clang happy// see: https://stackoverflow.com/questions/62779242
return number<decltype(a)>{a}.