https://microsoft.github.io/cpprestsdk/classmsl_1_1safeint3_1_1_addition_helper_3_01_t_00_01_u_00_01_addition_state___cast_int64_check_overflow_01_4.html
C++ Rest SDK: msl::safeint3::AdditionHelper T, U, AdditionState_CastInt64CheckOverflow Class...
t ucrestsdkmsl