Declare in script_constants.hpp
/* mob random groups */
export_constant(MOBG_Branch_Of_Dead_Tree);
export_constant(MOBG_Poring_Box);
export_constant(MOBG_Bloody_Dead_Branch);
export_constant(MOBG_Red_Pouch_Of_Surprise);
export_constant(MOBG_YOUR_Branch);
export_constant(MOBG_ClassChange);
export_constant(MOBG_Taekwon_Mission);