#743: Support setting individual Wither head targets

By: Yannick Lamprecht <yannicklamprecht@live.de>

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

@@ -1,7 +1,51 @@
 package org.bukkit.entity;
 
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
 /**
  * Represents a Wither boss
  */
 public interface Wither extends Monster, Boss {
+
+    /**
+     * {@inheritDoc}
+     * <p>
+     * This method will set the target of the {@link Head#CENTER center head} of
+     * the wither.
+     *
+     * @see #setTarget(org.bukkit.entity.Wither.Head, org.bukkit.entity.LivingEntity)
+     */
+    @Override
+    void setTarget(@Nullable LivingEntity target);
+
+    /**
+     * This method will set the target of individual heads {@link Head} of the
+     * wither.
+     *
+     * @param head the individual head
+     * @param target the entity that should be targeted
+     */
+    void setTarget(@NotNull Head head, @Nullable LivingEntity target);
+
+    /**
+     * This method will get the target of individual heads {@link Head} of the
+     * wither.
+     *
+     * @param head the individual head
+     * @return the entity targeted by the given head, or null if none is
+     * targeted
+     */
+    @Nullable
+    LivingEntity getTarget(@NotNull Head head);
+
+    /**
+     * Represents one of the Wither's heads.
+     */
+    enum Head {
+
+        CENTER,
+        LEFT,
+        RIGHT
+    }
 }