28    std::optional<bool> m_continuous_relaxation;
 
   29    std::optional<bool> m_lazy_cuts;
 
   30    std::optional<unsigned int> m_max_n_solution_in_pool;
 
   31    std::list<std::unique_ptr<CallbackFactory>> m_callbacks;
 
   44    static Cplex ContinuousRelaxation();
 
   48    Cplex& with_max_n_solution_in_pool(
unsigned int t_value);
 
   50    Cplex& with_lazy_cut(
bool t_value);
 
   52    Cplex& with_continuous_relaxation_only(
bool t_value);
 
   54    static Model read_from_file(
Env& t_env, 
const std::string& t_filename);