data: git_sort type slis_t_sortinfo_alv,
gwa_sort like line of git_sort.
gwa_sort-fieldname = 'XXX'.
gwa_sort-up = 'X'.
append gwa_sort to git_sort.
gwa_sort-fieldname = 'XXXX'.
gwa_sort-up = 'X'.
append gwa_sort to git_sort.
call function 'REUSE_ALV_GRID_DISPLAY'
exporting
i_callback_program = sy-repid
it_fieldcat = it_cat[]
is_layout = ls_layout
it_sort = git_sort
tables
t_outtab = itab.
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