Hi Jitendra,
IF_FPM_GUIBB_LIST~FLUSH of feeder class contains it_change_log which has old and new valiues for the changed field .
The flow will be like
FEEDER_1~Flush -> FEEDER_1~PROCESS_EVENT -> FEEDER_2~GET_DATA
You can declare an attribute of type it_change_log in your first feeder class(FEEDER_1) and then buffer this change log in FEEDER_1 flush method .
Use the same attribute to fill the single ton instance attribute (new class that you create for sharing )in Process event of FEEDER_1 ( if io_event->mv_event_id is FPM_TAB_CHANGE).
In your target UIBB feeder class , retrieve the single ton instance data and modify the CT_DATA parameter in GET_DATA method.
Regards
Arshad