text: #ifndef MANAVRION_STATIC_LIBRARY_SAMPLE_H_
  #define MANAVRION_STATIC_LIBRARY_SAMPLE_H_
  
  #include <cstdint>
  #include <vector>
  
  namespace static_library_sample {
  
  [[nodiscard]] int64_t add(const int64_t a, const int64_t b);
  [[nodiscard]] int64_t mul(const int64_t a, const int64_t b);
  
  [[nodiscard]] int64_t add_first3(const std::vector<int64_t>& xs);
  
  }  // namespace static_library_sample
  
  #endif  // MANAVRION_STATIC_LIBRARY_SAMPLE_H_
  