void generic_update_action_remaining_lazy( surf_action_lmm_t action, double now);
void generic_update_actions_state_lazy(double now, double delta, surf_model_t model);
void generic_update_actions_state_full(double now, double delta, surf_model_t model);
void generic_update_action_remaining_lazy( surf_action_lmm_t action, double now);
void generic_update_actions_state_lazy(double now, double delta, surf_model_t model);
void generic_update_actions_state_full(double now, double delta, surf_model_t model);