Minecraft 1.12-pre2 API Changes

By: md_5 <git@md-5.net>

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

@@ -0,0 +1,18 @@
+package org.bukkit.advancement;
+
+import java.util.Collection;
+import org.bukkit.Keyed;
+
+/**
+ * Represents an advancement that may be awarded to a player. This class is not
+ * reference safe as the underlying advancement may be reloaded.
+ */
+public interface Advancement extends Keyed {
+
+    /**
+     * Get all the criteria present in this advancement.
+     *
+     * @return a unmodifiable copy of all criteria
+     */
+    Collection<String> getCriteria();
+}