--- a/net/minecraft/world/lighting/LightEngine.java
+++ b/net/minecraft/world/lighting/LightEngine.java
@@ -215,4 +215,6 @@
       long i = SectionPos.func_218169_f(SectionPos.func_218166_b(p_223129_1_.field_77276_a, 0, p_223129_1_.field_77275_b));
       this.field_215627_c.func_223113_c(i, p_223129_2_);
    }
+
+   public abstract int queuedUpdateSize();
 }
