Adding input (preferably optional) to power lora loader.

[Symbiomatrix]

Hello @rgthree . I'm currently writing a small modification to the power lora loader based on this node to filter blocks by type and index. Unfortunately, I'm having trouble adding input to the node.
First, I don't know how to add more optional widgets beside FlexibleOptionalInputType(any_type); if I use a dictionary per the standard methods then it'll add an undesirable widget for the lora kwargs. When I add say a block_preset name list (as required), it looks fine at first, but then when the workflow is reloaded the widget goes missing. I think it's because power_lora_loader.js has a custom deserialisation function (configure?), since the text does appear in the json, but I am insufficiently versed with js to understand why.
If I try to add a plain input ("STRING",), anywhere, the node breaks completely.
Spare some advice?

Edit: Figured out the breaking was due to it requiring a settings dict (with forceInput to make it a separate node connection), so it at least works basically, but optional dict still breaks loras (none sent to kwargs).