Swap some nullable annotations (#9696)

patches/api/0130-AnvilDamageEvent.patch

@@ -6,10 +6,10 @@ Subject: [PATCH] AnvilDamageEvent
 
 diff --git a/src/main/java/com/destroystokyo/paper/event/block/AnvilDamagedEvent.java b/src/main/java/com/destroystokyo/paper/event/block/AnvilDamagedEvent.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..a83c286c1c11af25fc4d16af7a42b95ce90b9dee
+index 0000000000000000000000000000000000000000..aa5c3690fb898a7560a9551df91588a0cdc69fe2
 --- /dev/null
 +++ b/src/main/java/com/destroystokyo/paper/event/block/AnvilDamagedEvent.java
-@@ -0,0 +1,148 @@
+@@ -0,0 +1,151 @@
 +package com.destroystokyo.paper.event.block;
 +
 +import org.bukkit.Material;
@@ -19,6 +19,7 @@ index 0000000000000000000000000000000000000000..a83c286c1c11af25fc4d16af7a42b95c
 +import org.bukkit.event.inventory.InventoryEvent;
 +import org.bukkit.inventory.AnvilInventory;
 +import org.bukkit.inventory.InventoryView;
++import org.jetbrains.annotations.ApiStatus;
 +import org.jetbrains.annotations.NotNull;
 +import org.jetbrains.annotations.Nullable;
 +
@@ -26,11 +27,13 @@ index 0000000000000000000000000000000000000000..a83c286c1c11af25fc4d16af7a42b95c
 + * Called when an anvil is damaged from being used
 + */
 +public class AnvilDamagedEvent extends InventoryEvent implements Cancellable {
-+    private static final HandlerList handlers = new HandlerList();
++    private static final HandlerList HANDLER_LIST = new HandlerList();
++
 +    private boolean cancel;
 +    private DamageState damageState;
 +
-+    public AnvilDamagedEvent(@NotNull InventoryView inventory, @NotNull BlockData blockData) {
++    @ApiStatus.Internal
++    public AnvilDamagedEvent(@NotNull InventoryView inventory, @Nullable BlockData blockData) {
 +        super(inventory);
 +        this.damageState = DamageState.getState(blockData);
 +    }
@@ -92,12 +95,12 @@ index 0000000000000000000000000000000000000000..a83c286c1c11af25fc4d16af7a42b95c
 +
 +    @NotNull
 +    public HandlerList getHandlers() {
-+        return handlers;
++        return HANDLER_LIST;
 +    }
 +
 +    @NotNull
 +    public static HandlerList getHandlerList() {
-+        return handlers;
++        return HANDLER_LIST;
 +    }
 +
 +    /**
@@ -109,7 +112,7 @@ index 0000000000000000000000000000000000000000..a83c286c1c11af25fc4d16af7a42b95c
 +        DAMAGED(Material.DAMAGED_ANVIL),
 +        BROKEN(Material.AIR);
 +
-+        private Material material;
++        private final Material material;
 +
 +        DamageState(@NotNull Material material) {
 +            this.material = material;
@@ -154,7 +157,7 @@ index 0000000000000000000000000000000000000000..a83c286c1c11af25fc4d16af7a42b95c
 +                    return state;
 +                }
 +            }
-+            throw new IllegalArgumentException("Material not an anvil");
++            throw new IllegalArgumentException("Material is not an anvil state");
 +        }
 +    }
 +}