[1.12.2] Nether Portal Custom Dimension Compatibility

[JonIsPatented]

I have a custom dimension that I want tot keep separate from all dimensions but the Overworld. When I light a nether portal in that dimension, it lights and will connect to the nether. I want it to not do that. How can I stop a nether portal from working while I'm in my dimension?

EDIT: I am a mental defective and they actually don't work. The problem is a non-starter, and I'm also a spoon, because I don't know how to delete a forum post.

Edited September 19, 2019 by JonIsPatented

[loordgek]

there is a event for when a portal is placed

https://github.com/MinecraftForge/MinecraftForge/blob/1.12.x/src/main/java/net/minecraftforge/event/world/BlockEvent.java#L492

you can cancel the event