unregisters this computerlistener so that it will never receive further events . unless computerlistener is unregistered , it will never be a subject of gc . concode_field_sep PlaceHolder placeHolder concode_field_sep ExtensionList<ComputerListener> all concode_elem_sep void onConfigurationChange concode_elem_sep void onTemporarilyOffline concode_elem_sep void onTemporarilyOnline concode_elem_sep void onLaunchFailure concode_elem_sep void onOffline concode_elem_sep void onOffline concode_elem_sep void preOnline concode_elem_sep void onOnline concode_elem_sep void onOnline concode_elem_sep void preLaunch concode_elem_sep void register
boolean function ( ) { return all ( ) . remove ( this ) ; }