Add ResourceKey#of(Key)

Author: aromaa

src/main/java/org/spongepowered/api/ResourceKey.java

@@ -131,6 +131,17 @@ static ResourceKey of(final PluginContainer plugin, final String value) {
         return Sponge.game().factoryProvider().provide(Factory.class).of(Objects.requireNonNull(plugin, "plugin"), Objects.requireNonNull(value, "value"));
     }
 
+    /**
+     * Creates a resource key.
+     *
+     * @param key The Key
+     * @return A new resource key
+     */
+    static ResourceKey of(final Key key) {
+        Objects.requireNonNull(key, "key");
+        return ResourceKey.of(key.namespace(), key.value());
+    }
+
     /**
      * Resolves a resource key from a string.
      *