--- a/net/minecraft/server/TicketType.java
+++ b/net/minecraft/server/TicketType.java
@@ -17,6 +17,7 @@
     public static final TicketType<ChunkCoordIntPair> LIGHT = a("light", Comparator.comparingLong(ChunkCoordIntPair::pair));
     public static final TicketType<BlockPosition2D> PORTAL = a("portal", Comparator.comparingLong(BlockPosition2D::b));
     public static final TicketType<ChunkCoordIntPair> UNKNOWN = a("unknown", Comparator.comparingLong(ChunkCoordIntPair::pair));
+    public static final TicketType<Unit> PLUGIN = a("plugin", (a, b) -> 0); // CraftBukkit
 
     public static <T> TicketType<T> a(String s, Comparator<T> comparator) {
         return new TicketType<>(s, comparator);