[Cache][Contracts] We must save the item or the trait does not have any effect

Author: Nyholm

GetForCacheItemPoolTrait.php

@@ -36,6 +36,7 @@ public function get(string $key, callable $callback, float $beta = null)
  if (INF === $beta || !$item->isHit()) {
  $value = $callback($item);
  $item->set($value);
+ $this->save($item);
  }
 
  return $item->get();