Load World Error

I am working on a plugin which makes use of additional worlds. I am able to create the world, however I am getting an AbstractMethodError when calling game.getServer().loadWorld( properties ). If I stop and restart the server, the new world will load with the others. Should I not be using the loadWorld method?

It’s likely unimplemented, you can either make an issue on one of the correct github issue pages (SpongeVanilla, Sponge/Common or Sponge), or report what Sponge version & implementation you are using and I can create the issue on your behalf linking back to this thread.