Unfortunately this option is not available in your release. It is first available as part of SAS 9.4TS1M5, which is the release after the one you are currently running.
https://go.documentation.sas.com/?cdcId=pgmsascdc&cdcVersion=9.4_3.3&docsetId=statug&docsetTarget=statug_whatsnew_sect006.htm&locale=en
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