When using LOOP AT...GROUP BY... in ABAP, is it possible to pass the data in the group into another method as a changing parameter? To illustrate:

LOOP AT t_tab INTO DATA(s_tab) GROUP BY ( f1  = s_tab-f1 ) ASSIGNING FIELD-SYMBOL(<g_tab2>).

" Pass data in group <g_tab> into another method to make changes to it

ENDLOOP.

I know I could pass it into a method with export/import and then update the table in a separate loop based on matching keys but I was wondering if there was a simpler way.