#745: Expose more information about advancements

By: MartenM <marten.struijk@gmail.com>

paper-api/src/main/java/org/bukkit/advancement/Advancement.java

@@ -3,6 +3,7 @@ package org.bukkit.advancement;
 import java.util.Collection;
 import org.bukkit.Keyed;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 /**
  * Represents an advancement that may be awarded to a player. This class is not
@@ -17,4 +18,14 @@ public interface Advancement extends Keyed {
      */
     @NotNull
     Collection<String> getCriteria();
+
+    /**
+     * Returns the display information for this advancement.
+     *
+     * This includes it's name, description and other visible tags.
+     *
+     * @return a AdvancementDisplay object, or null if not set.
+     */
+    @Nullable
+    AdvancementDisplay getDisplay();
 }