问什么是可插拔适配器设计模式？

EN

  #include <iostream>
  #include <functional>

  //Adaptee 1
  struct CoffeMaker {
    void Brew (double quantity, double temp) const{
     std::cout << "I am brewing " << quantity <<"ml coffee @" << temp <<" degree C" <<std::endl; 
   }
  };

  //Adaptee 2 (having difference interface from Adaptee 2)
  struct  JuiceMaker{
    void Squeeze (double quantity) const{
      std::cout << "I am making " << quantity <<"ml Juice" <<std::endl; 
   }
  };

  // Target
  struct Beverage{
    virtual void getBeverage (int quantity) = 0;
  };

  // Adapter
  class Adapter : public Beverage{
    std::function<void(int)> Request;

  public:
    Adapter(CoffeMaker *cm1){
      Request = [cm1](int quantity){
        cm1->Brew(quantity,80);
      };
      delete cm1;
    }

    Adapter(JuiceMaker *jm1){
      Request = [jm1](int quantity){
        jm1->Squeeze(quantity);
      };
      delete jm1;
    }

    void getBeverage(int quantity){
      Request(quantity);
    }
  };

  //Client
  int main(){
    Adapter adp1(new CoffeMaker());
    adp1.getBeverage(30);
    
    Adapter adp2(new JuiceMaker());
    adp2.getBeverage(40);

  }