Can now create worlds with specific seeds

By: Dinnerbone <dinnerbone@dinnerbone.com>

paper-api/src/main/java/org/bukkit/Server.java

@@ -133,6 +133,18 @@ public interface Server {
      */
     public World createWorld(String name, World.Environment environment);
 
+    /**
+     * Creates or loads a world with the given name.
+     * If the world is already loaded, it will just return the equivalent of
+     * getWorld(name)
+     *
+     * @param name Name of the world to load
+     * @param environment Environment type of the world
+     * @param seed Seed value to create the world with
+     * @return Newly created or loaded World
+     */
+    public World createWorld(String name, World.Environment environment, long seed);
+
     /**
      * Gets the world with the given name
      *