Using regular DISPLAY ARRAY control blocks

If needed, you can implement traditional DISPLAY ARRAY control blocks like BEFORE ROW or AFTER ROW:

DISPLAY ARRAY tree_arr TO sr.* ATTRIBUTES(UNBUFFERED)
  BEFORE ROW
    DISPLAY "BEFORE ROW - Current row is: ", DIALOG.getCurrentRow("sr")
  AFTER ROW
    DISPLAY "AFTER ROW  - Current row is: ", DIALOG.getCurrentRow("sr")
END DISPLAY