provide InventoryMenu on Containers if available

also typo fix #2424

Author: Faithcaio

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

@@ -120,7 +120,7 @@ static Builder builder() {
      * @return A new resource key
      */
     static ResourceKey of(final String namespace, final String value) {
-        return Sponge.game().factoryProvider().provide(Factory.class).of(Objects.requireNonNull(namespace, "mamespace"), Objects.requireNonNull(value, "value"));
+        return Sponge.game().factoryProvider().provide(Factory.class).of(Objects.requireNonNull(namespace, "namespace"), Objects.requireNonNull(value, "value"));
     }
 
     /**

src/main/java/org/spongepowered/api/item/inventory/Container.java

@@ -24,8 +24,8 @@
  */
 package org.spongepowered.api.item.inventory;
 
-import org.spongepowered.api.entity.living.player.Player;
 import org.spongepowered.api.entity.living.player.server.ServerPlayer;
+import org.spongepowered.api.item.inventory.menu.InventoryMenu;
 
 import java.util.List;
 import java.util.Optional;
@@ -98,4 +98,11 @@ public interface Container extends Inventory {
      */
     ContainerType type();
 
+    /**
+     * Returns the {@link InventoryMenu} if this container has been opened by one.
+     *
+     * @return the current InventoryMenu if present
+     */
+    Optional<InventoryMenu> currentMenu();
+
 }