Right now you have a returnDim. Your API mod has an additional argument, onlyIgnitableInReturnDim. I'd like to request that be added to the JSON interface.

My use case: Thanks to some older Fabric mods finally updating to recent Minecraft versions, I'm attempting to put a long-time world into our server as an extra dimension. Your portals are nice for getting to the old overworld, but now I'm trying to figure out if I can keep the old Nether too, and have some of the old farms actually function.

So, I'd like to add a custom portal buildable in the custom overworld and leading to the custom nether, and buildable in the custom nether, leading to the custom overworld. My understanding is that that's what the onlyIgnitableInReturnDim flag would do.