--- a/net/minecraft/server/TicketType.java
+++ b/net/minecraft/server/TicketType.java
@@ -19,6 +19,8 @@
     public static final TicketType<BlockPosition2D> PORTAL = a("portal", Comparator.comparingLong(BlockPosition2D::b));
     public static final TicketType<Integer> POST_TELEPORT = a("post_teleport", Integer::compareTo, 5);
     public static final TicketType<ChunkCoordIntPair> UNKNOWN = a("unknown", Comparator.comparingLong(ChunkCoordIntPair::pair), 1);
+    public static final TicketType<Unit> PLUGIN = a("plugin", (a, b) -> 0); // CraftBukkit
+    public static final TicketType<org.bukkit.plugin.Plugin> PLUGIN_TICKET = a("plugin_ticket", (plugin1, plugin2) -> plugin1.getClass().getName().compareTo(plugin2.getClass().getName())); // Craftbukkit
 
     public static <T> TicketType<T> a(String s, Comparator<T> comparator) {
         return new TicketType<>(s, comparator, 0L);