Get ALV instance From ALV Function

While using ALV function to display ALV grid , there are some restrictions according to oo alv. FM below gives us the chance to use alv instance without restrictions.

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 data: lr_grid type ref to cl_gui_alv_grid.

  call function 'GET_GLOBALS_FROM_SLVC_FULLSCR'
    importing
      e_grid = lr_grid.

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