text: #ifndef ISA_PROJ_NACK_H
  #define ISA_PROJ_NACK_H
  
  #include "AbstractRequest.h"
  
  /**
   * class represents DHCP NACK messages
   */
  class Nack : public AbstractReply{
      const string _name = "Nack";
  public:
      /**
       * Basically just sets all fields to zero in this case
       */
      virtual void performTask(DhcpMessage & msg, IpAddress & addr,AddressHandler & handler);
      virtual string toString() const{
          return this->_name;
      }
  
      virtual string getLoggableName() const{
          return this->_name;
      }
  };
  
  #endif //ISA_PROJ_NACK_H
  