https://daringfireball.net/linked/2006/08/16/intype
Daring Fireball: Intype
daring fireball
https://microsoft.github.io/cpprestsdk/classpplx_1_1___continuation__func__transformer_3_01___in_type_00_01void_01_4.html
C++ Rest SDK: pplx::_Continuation_func_transformer _InType, void Class Template Reference