text: 
  #ifndef __ZTPD_UI_H__
  #define __ZTPD_UI_H__
  
  struct ztpd;
  
  /**
   * @brief Activates the ui service.
   *
   * @param ztpd The global ztpd instance.
   * @return int
   */
  int
  ztpd_ui_activate(struct ztpd *ztpd);
  
  /**
   * @brief Deactivates the ui service.
   *
   * @param ztpd The global ztpd instance.
   * @return int
   */
  int
  ztpd_ui_deactivate(struct ztpd *ztpd);
  
  #endif //__ZTPD_UI_H__
  