add missing barPrototype

Author: honzabrecka

Prototype/index.php

@@ -10,3 +10,8 @@
     $book = clone $fooPrototype;
     $book->setTitle('Foo Book No ' . $i);
 }
+
+for ($i = 0; $i < 5000; $i++) {
+    $book = clone $barPrototype;
+    $book->setTitle('Bar Book No ' . $i);
+}