nbt support WIP and proper container API

src/main/java/carpet/script/value/LazyListValue.java

@@ -126,11 +126,6 @@ public abstract class LazyListValue extends AbstractListValue implements Iterato
         return false;
     }
 
-    @Override
-    public Value getElementAt(Value v2)
-    {
-        throw new InternalExpressionException("get element can only be obtained for regular lists");
-    }
     @Override
     public String getTypeString()
     {