void register_class(const char *class_name, const luaL_Reg *funcs, EffectType effect_type = NO_EFFECT_TYPE);
int set_theme_menu(lua_State *L);
Chain get_chain_from_effect_chain(movit::EffectChain *effect_chain, unsigned num, const InputState &input_state);
void register_class(const char *class_name, const luaL_Reg *funcs, EffectType effect_type = NO_EFFECT_TYPE);
int set_theme_menu(lua_State *L);
Chain get_chain_from_effect_chain(movit::EffectChain *effect_chain, unsigned num, const InputState &input_state);