Don't call AsyncTabCompleteEvent from netty IO thread (#8218)

patches/api/0341-Add-player-health-update-API.patch

@@ -0,0 +1,42 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: SamB440 <sam@islandearth.net>
+Date: Wed, 17 Nov 2021 12:30:36 +0000
+Subject: [PATCH] Add player health update API
+
+
+diff --git a/src/main/java/org/bukkit/entity/Player.java b/src/main/java/org/bukkit/entity/Player.java
+index 0a400ecdffa18eb836fed62961f151ff6842011b..78034fcc89ceeba6934569189f24e5a41229d848 100644
+--- a/src/main/java/org/bukkit/entity/Player.java
++++ b/src/main/java/org/bukkit/entity/Player.java
+@@ -1893,6 +1893,31 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
+      */
+     public double getHealthScale();
+ 
++    // Paper start
++    /**
++     * Forcefully sends a health update to the player.
++     * <p>This method can cause the client to display health values
++     * different to their true server values. If the player takes damage or
++     * causes an action to otherwise cause a health update, these values
++     * will no longer be shown.</p>
++     * Setting the visible health to 0 will result in the client seeing
++     * the death screen, unable to press the respawn button.
++     * @see #sendHealthUpdate()
++     * @param health the health of the player
++     * @param foodLevel the food level of the player
++     * @param saturationLevel the saturation level of the player
++     */
++    public void sendHealthUpdate(final double health, final int foodLevel, final float saturationLevel);
++    
++    /**
++     * Forcefully sends a health update to the player.
++     * This uses the player's current health, saturation, and food level.
++     * <p>Use after {@link #setHealth(double)} to show the heart animation
++     * of gaining or losing health.</p>
++     */
++    public void sendHealthUpdate();
++    // Paper end
++    
+     /**
+      * Gets the entity which is followed by the camera when in
+      * {@link GameMode#SPECTATOR}.