RPL: How to check if a data source is available
Is there any reliable way to check by using RPL, if a data source exists on a campaign?
I have tried using ?? and ?is_hash, but ?? only works for fields and not for the data sources themselves. Using ?is_hash isn't reliable either, because as soon as the data source is being used as a lookup table, then the data source type is a string instead of hash.
I'd like to use the data source check in an if statement, e.g.:
<#if STAY??>
do stuff, that uses the data source
</#if>
0