[ci skip] Cleanup events (#10202)

patches/api/Entity-Jump-API.patch

@@ -16,6 +16,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +import org.bukkit.event.Cancellable;
 +import org.bukkit.event.HandlerList;
 +import org.bukkit.event.entity.EntityEvent;
++import org.jetbrains.annotations.ApiStatus;
 +import org.jetbrains.annotations.NotNull;
 +
 +/**
@@ -24,9 +25,12 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 + * Cancelling the event will stop the entity from jumping
 + */
 +public class EntityJumpEvent extends EntityEvent implements Cancellable {
-+    private static final HandlerList handlers = new HandlerList();
-+    private boolean canceled;
 +
++    private static final HandlerList HANDLER_LIST = new HandlerList();
++
++    private boolean cancelled;
++
++    @ApiStatus.Internal
 +    public EntityJumpEvent(@NotNull LivingEntity entity) {
 +        super(entity);
 +    }
@@ -34,26 +38,26 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    @NotNull
 +    @Override
 +    public LivingEntity getEntity() {
-+        return (LivingEntity) entity;
++        return (LivingEntity) super.getEntity();
 +    }
 +
 +    public boolean isCancelled() {
-+        return canceled;
++        return this.cancelled;
 +    }
 +
 +    public void setCancelled(boolean cancel) {
-+        canceled = cancel;
++        this.cancelled = cancel;
 +    }
 +
 +    @NotNull
 +    @Override
 +    public HandlerList getHandlers() {
-+        return handlers;
++        return HANDLER_LIST;
 +    }
 +
 +    @NotNull
 +    public static HandlerList getHandlerList() {
-+        return handlers;
++        return HANDLER_LIST;
 +    }
 +}
 diff --git a/src/main/java/org/bukkit/entity/LivingEntity.java b/src/main/java/org/bukkit/entity/LivingEntity.java