text: #ifndef EVOLVER_HPP
  #define EVOLVER_HPP
  
  
  #include "Creature.hpp"
  #include "Mutation.hpp"
  
  
  class Evolver {
  public:
      Evolver(std::vector<RenderableCreature>& creatures);
  
      uint64_t replaceRNN(uint64_t id);
  
  private:
      std::vector<RenderableCreature>&    _creatures;
  };
  
  
  #endif // EVOLVER_HPP
  