Geofile Reader node doesn't handle flow variables

Hallo Knime experts,

I’m trying to conduct some analysis on a number of geojson files. I was expecting to be able to be able to get a list of these from a directory and iterate over them using a ‘List Files/Folders’ node and a ‘Table Row To Variable Loop’ node, but I can’t see how to plumb the loop variables in to the ‘Geofile Reader’ nodes.

Is it possible to add this functionality, or should I be doing this in a different way?