Overwritten BukkitGUIContent#toString method to use actual ItemGUIContent

Author: fulminazzo

gui/bukkit/src/main/java/it/angrybear/yagl/contents/BukkitGUIContent.java

@@ -238,6 +238,11 @@ public BukkitGUIContent setMaterial(@NotNull Material material) {
         return (BukkitGUIContent) BukkitItem.super.setMaterial(material);
     }
 
+    @Override
+    public @NotNull String toString() {
+        return copy(ItemGUIContent.class).toString();
+    }
+
     public static BukkitGUIContent newInstance(final @NotNull String material,
                                                final @NotNull Consumer<ItemMeta> metaFunction) {
         return new BukkitGUIContent(material, metaFunction);