I have a requirement to have different maximum lengths of a column based on a value in the parent table. I have figured out that the apex.region will not work on the modal because it always returns a Null when referencing the modal's interactive grid. I believe that I need to use the dialog command but haven't been able to determine the correct way to reference the gird on the modal, plus I can't find anything that tells me how to configure the maximum length. I'm using APEX 19.1.