Method Attach

deps/FtpClient/Definements.h:233–240

   }

   bool Attach(T p)
   {
      if (this->find(p)!=base_type::end())
         return false;
      this->insert(p);
      p->Attach(static_cast<T2>(this));
      return true;
   }
   bool Detach(T p)
   {
      if (this->find(p)==base_type::end())