Using custom biomes for advancements requiring a 'location' trigger

[X Squishling X]

Hello everyone!  Recently, I have been attempting to create advancments for my Minecraft mod.  I have a custom biome that I have created, and am trying to create an advancment that unlocks upon the player entering this custom biome.  I have managed to get the advancments working for vanilla biomes, but when trying to enter my own biome in I don't know what to enter for the biome id.  I have tried using F3 in-game to get the ID, but this just gives me the name ('Snowy Plains') which doesn't work in the biome ID, with or without my mod id before it.  I have also tried using a forge method that returns a biome id in number form, and this also failed to give me any working results.

I'm wondering what the correct way to provide a biome ID for a custom advancment featuring a location requirement is, and if anyone knows the answer, your help would be greatly appreciated!

[Choonster]

You need to use the registry name of the Biome, not the numeric ID or the display name. This will be whatever you name you've specified in the setRegistryName call for the Biome.

[X Squishling X]

Probably would have helped if I had done a registry name, I guess the tutorial I watched for biome had something wrong...  Thanks for your help, I've been trying to do this for a while now!