Method getCategory

include/common/enum_errcode.hpp:77–79

  };

  constexpr ErrCategory getCategory() const noexcept {
    return static_cast<ErrCategory>(static_cast<uint8_t>(Inner.Num >> 24));
  }
  constexpr uint32_t getCode() const noexcept {
    return Inner.Num & 0x00FFFFFFU;
  }