V10verlap

# World "world"
world:
# has world_the_end as upper world and
  upper: world_the_end
# world_nether as lower world.
  lower: world_nether
# MinimumY to teleport from/to is 5.
  minY: 5
# MaximumY to teleport from/to is 100.
  minY: 100
# World "world_the_end"
world_the_end:
# has world as lower world.
  lower: world
# World "nether"
world_nether:
# Has world as upper world.
  upper: world

private V10verlap_API v10verlap_API = null;
public void onEnable()
{
  V10verlap v10verlap = (V10verlap)getServer().getPluginManager().getPlugin("V10verlap");
  if(V10verlap != null)
  {
    v10verlap_API = v10verlap.getAPI();
    if(v10verlap_API.getVersion() >= 2.0D) // Check for an API breakage, this is important!
      v10verlap_API = null;
  }
}

public World[] getLinkedWorlds(World world)
{
  World[] out = new World[2];
  if(v10verlap_API == null)
    return out;
  out[0] = v10verlap_API.getUpperWorld(world);
  out[1] = v10verlap_API.getLowerWorld(world);
  return out;
}

public int[] getYlimits(World world)
{
  int[] out = new int[2];
  if(v10verlap_API == null)
    return out;
  out[0] = v10verlap_API.getMinY(world);
  out[1] = v10verlap_API.getMaxY(world);
  return out;
}