SAP Function Module 'POPUP_WITH_WARNING' to display a POP UP

CALL FUNCTION 'POPUP_WITH_WARNING'
  EXPORTING
    textline1 = 'Some Important Info Missing'
    textline2 = 'Still Want to Continue'
    titel     = 'Warning'.

WRITE 'proceed after warning popup'. 

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Execute the program.

Here is the pop up.

 After continue.