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