Using Biome IDs for Random Spawning Condition

I looked in the manual and it didn't mention this feature. I assumed it would work but wanted to make sure so I asked the community here. A moderator replied and said he/she doesn't think it works but it would be a good thing to add.

My suggestion:
It'd be cool if we could use biome IDs instead of only biome names for the random spawning condition.

Why?
First, it's more...

Using Biome IDs for Random Spawning Condition