From c3a4d3e6de16ed8c2f252164c797cb492ed4c48f Mon Sep 17 00:00:00 2001
From: Mikhail <99481254+DCFApixels@users.noreply.github.com>
Date: Thu, 22 Jun 2023 04:09:43 +0800
Subject: [PATCH] add EmptySubject

---
 src/Builtin/Subjects.cs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Builtin/Subjects.cs b/src/Builtin/Subjects.cs
index 40411ac..c281044 100644
--- a/src/Builtin/Subjects.cs
+++ b/src/Builtin/Subjects.cs
@@ -1,5 +1,7 @@
 namespace DCFApixels.DragonECS
 {
+    public sealed class EmptySubject : EcsSubject { }
+
     public sealed class SingleSubject<TPool> : EcsSubject where TPool : IEcsPoolImplementation, new()
     {
         public readonly TPool pool;