Switch to consumer + remove debug message

SpigotCore_Main/src/de/steamwar/inventory/SWAnvilInv.java

@@ -26,13 +26,14 @@ import org.bukkit.entity.Player;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.function.Consumer;
 
 public class SWAnvilInv {
 
     private final AnvilGUI.Builder builder;
     private final Player player;
 
-    private Response callback;
+    private Consumer<String> callback;
 
     public SWAnvilInv(Player p, String t){
         builder = new AnvilGUI.Builder().plugin(Core.getInstance()).title(t).text("»").onComplete(this::onResult);
@@ -55,7 +56,7 @@ public class SWAnvilInv {
         builder.itemLeft(new SWItem(m, meta, "»", lore, e, null).getItemStack());
     }
 
-    public void setCallback(Response callback){
+    public void setCallback(Consumer<String> callback){
         this.callback = callback;
     }
 
@@ -70,15 +71,7 @@ public class SWAnvilInv {
     private AnvilGUI.Response onResult(Player player, String s) {
         if(s.startsWith("»"))
             s = s.substring(1);
-        callback.onResult(s);
+        callback.accept(s);
         return AnvilGUI.Response.close();
     }
-
-    public void onClose(Player player) {
-        player.sendMessage("Closing");
-    }
-
-    public static interface Response{
-        void onResult(String s);
-    }
 }