Flatten Item variants, remove Item->setDamage()

src/pocketmine/entity/Entity.php

@@ -329,6 +329,15 @@ abstract class Entity extends Location implements Metadatable, EntityIds{
 		self::$saveNames[$className] = $saveNames;
 	}
 
+	/**
+	 * Returns an array of all registered entity classpaths.
+	 *
+	 * @return string[]
+	 */
+	public static function getKnownEntityTypes() : array{
+		return array_unique(self::$knownEntities);
+	}
+
 	/**
 	 * Helper function which creates minimal NBT needed to spawn an entity.
 	 *