[ci skip] Cleanup events (#10202)

patches/api/0017-Add-PlayerLocaleChangeEvent.patch

@@ -6,16 +6,18 @@ Subject: [PATCH] Add PlayerLocaleChangeEvent
 
 diff --git a/src/main/java/com/destroystokyo/paper/event/player/PlayerLocaleChangeEvent.java b/src/main/java/com/destroystokyo/paper/event/player/PlayerLocaleChangeEvent.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..bb7baa91fd4ba763fd8ce216bc9043c5e2c4b7b7
+index 0000000000000000000000000000000000000000..57f6c47e4e759abf0af9aa8962551225cc12246c
 --- /dev/null
 +++ b/src/main/java/com/destroystokyo/paper/event/player/PlayerLocaleChangeEvent.java
-@@ -0,0 +1,51 @@
+@@ -0,0 +1,60 @@
 +package com.destroystokyo.paper.event.player;
 +
 +import org.bukkit.entity.Player;
 +import org.bukkit.event.HandlerList;
 +import org.bukkit.event.player.PlayerEvent;
 +import org.jetbrains.annotations.ApiStatus;
++import org.jetbrains.annotations.NotNull;
++import org.jetbrains.annotations.Nullable;
 +
 +/**
 + * Called when the locale of the player is changed.
@@ -24,11 +26,14 @@ index 0000000000000000000000000000000000000000..bb7baa91fd4ba763fd8ce216bc9043c5
 + */
 +@Deprecated(forRemoval = true) @ApiStatus.ScheduledForRemoval(inVersion = "1.21")
 +public class PlayerLocaleChangeEvent extends PlayerEvent {
-+    private static final HandlerList handlers = new HandlerList();
++
++    private static final HandlerList HANDLER_LIST = new HandlerList();
++
 +    private final String oldLocale;
 +    private final String newLocale;
 +
-+    public PlayerLocaleChangeEvent(final Player player, final String oldLocale, final String newLocale) {
++    @ApiStatus.Internal
++    public PlayerLocaleChangeEvent(final @NotNull Player player, final @Nullable String oldLocale, final @NotNull String newLocale) {
 +        super(player);
 +        this.oldLocale = oldLocale;
 +        this.newLocale = newLocale;
@@ -39,8 +44,9 @@ index 0000000000000000000000000000000000000000..bb7baa91fd4ba763fd8ce216bc9043c5
 +     *
 +     * @return player's old locale
 +     */
++    @Nullable
 +    public String getOldLocale() {
-+        return oldLocale;
++        return this.oldLocale;
 +    }
 +
 +    /**
@@ -48,16 +54,19 @@ index 0000000000000000000000000000000000000000..bb7baa91fd4ba763fd8ce216bc9043c5
 +     *
 +     * @return player's new locale
 +     */
++    @NotNull
 +    public String getNewLocale() {
-+        return newLocale;
++        return this.newLocale;
 +    }
 +
 +    @Override
++    @NotNull
 +    public HandlerList getHandlers() {
-+        return handlers;
++        return HANDLER_LIST;
 +    }
 +
++    @NotNull
 +    public static HandlerList getHandlerList() {
-+        return handlers;
++        return HANDLER_LIST;
 +    }
 +}