I've seen a number of resources that described how to create a customized UI for modular inputs, but this customization is limited to the configuration of the Manager XML file. In this configuration, the customer will have possibility to specify only some static configs.
We'd like to build a highly customized UI for "modular inputs", hence, we should call external REST services to help customers to specify correct values for "modular inputs", like present a drop-down with options and other stuff.
Is there any way to create such a customized UI for modular inputs? Any good references to follow?