Is it possible to check if variable exists with butler?
Example:
1. using pattern:
"{cardduecomplete} ? Completed at {cardlastactivitydate) : not completed"
2. create a report in variable "weekreport" ... and message:
"{if $weekreport} {$weekreport} {else} Empty list - nothing in the report"
There is no support for your requirement. You option is to use http request to return a {httpresponse}. To return a string to use in a comment is definitely doable but for a report variable will need to be tested.
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