void (*action_cancel) (surf_action_t action); /**< Cancel a running action */
void (*action_recycle) (surf_action_t action); /**< Recycle an action */
void (*action_data_set) (surf_action_t action, void *data); /**< Set the user data of an action */
void (*action_cancel) (surf_action_t action); /**< Cancel a running action */
void (*action_recycle) (surf_action_t action); /**< Recycle an action */
void (*action_data_set) (surf_action_t action, void *data); /**< Set the user data of an action */