Missing Entity API

Co-authored-by: Nassim Jahnke <nassim@njahnke.dev>
Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>
Co-authored-by: William Blake Galbreath <blake.galbreath@gmail.com>
Co-authored-by: SoSeDiK <mrsosedik@gmail.com>
Co-authored-by: booky10 <boooky10@gmail.com>
Co-authored-by: Amin <amin.haddou@frg.wwschool.de>
Co-authored-by: TrollyLoki <trollyloki@gmail.com>
Co-authored-by: FireInstall <kettnerl@hu-berlin.de>
Co-authored-by: maxcom1 <46265094+maxcom1@users.noreply.github.com>
Co-authored-by: TotalledZebra <Holappa57@gmail.com>

paper-api/src/main/java/org/bukkit/entity/AreaEffectCloud.java

@@ -259,4 +259,20 @@ public interface AreaEffectCloud extends Entity {
      * @param source the {@link ProjectileSource} that threw the LingeringPotion
      */
     public void setSource(@Nullable ProjectileSource source);
+
+    // Paper start - owner API
+    /**
+     * Get the entity UUID for the owner of this area effect cloud.
+     *
+     * @return the entity owner uuid or null
+     */
+    @Nullable java.util.UUID getOwnerUniqueId();
+
+    /**
+     * Sets the entity UUID for the owner of this area effect cloud.
+     *
+     * @param ownerUuid the entity owner uuid or null to clear
+     */
+    void setOwnerUniqueId(@Nullable java.util.UUID ownerUuid);
+    // Paper end
 }