Remove search_by_id() from frameline. - frameline is only responsible for drawing a row of frames. - layers and scenes are managed by MBScene_dom. So, function of search_by_id() must move to MBScene_dom class. - onCellClick() and _change_active_frame() are responsible for handling GUI event. - It should not be used with workaround to implement some function. - Solutions - MBScene_dom.find_layer_n_scene_of_nod() is used to replace search_by_id(). - MBScene_framelines.active_frame() is used to replace the workaround.

#ifndef __MB_BACKEND_UTILS_H_
#define __MB_BACKEND_UTILS_H_

#include "mb_backend.h"
#include "mb_timer.h"

/*! \brief A facotry of timer manager implemented with mb_tman_t.
 */
extern mb_timer_factory_t tman_timer_factory;
extern mb_tman_t *tman_timer_man_get_tman(mb_timer_man_t *tm_man);

#endif /* __MB_BACKEND_UTILS_H_ */