I've built my own Liquid template verification application that will take a liquid template + a sample file and then output the result. The app is using the same version of Dotliquid that Logic Apps does but there seems to be a custom filter JSONArrayFor that I'm not able to replicate.
Running the app with the filter throws an error "DotLiquid.Exceptions.SyntaxException: Unknown tag 'JSONArrayFor'" so it has to be a custom filter created by the Azure team.
Does anyone have any clue where I can find the source, the logic or anything in regard what it does and how the filter works?