Allow getting of all template keys.

Signed-off-by: Chris Sanders <[email protected]>

Author: Zidane

src/main/java/org/spongepowered/api/world/server/WorldManager.java

@@ -81,6 +81,14 @@ public interface WorldManager {
      */
     List<ResourceKey> worldKeys();
 
+    /**
+     * Gets the {@link ResourceKey keys} of {@link WorldTemplate templates}.
+     *
+     * <p>It is up to the implementation to determine how template keys are provided to the developer.</p>
+     * @return The keys
+     */
+    List<ResourceKey> templateKeys();
+
     /**
      * Gets the {@link ResourceKey keys} of offline {@link ServerWorld worlds}.
      *