Then in feeder class
IF_POWL_FEEDER~GET_ACTIONS - buttons definitions
IF_POWL_FEEDER~HANDLE_ACTION - buttons actions
IF_POWL_FEEDER~GET_ACTION_CONF - define an action confirmation message
Then in feeder class
IF_POWL_FEEDER~GET_ACTIONS - buttons definitions
IF_POWL_FEEDER~HANDLE_ACTION - buttons actions
IF_POWL_FEEDER~GET_ACTION_CONF - define an action confirmation message