From Bukkit Objects

Players

For legacy reasons and future cross-platform support, WorldGuard uses its own internal player object called LocalPlayer. A Bukkit Player can be converted to a LocalPlayer using wrapPlayer(Player) on WorldGuardPlugin.

WorldGuardPlugin.inst().wrapPlayer(player);

Vectors

Many operations need WorldEdit vectors, worlds, and so on. Bukkit Locations and other objects can be converted to Vector and so on using methods in com.sk89q.worldedit.bukkit.BukkitAdapter.

BukkitAdapter.adapt(location);
BukkitAdapter.adapt(world);