inject.php

<?php

class ConfigImporter {
  protected  $storage;
  
  
  public function setStorage($storage) {
    $this->storage = $storage;
  }
  
  pubic function getStorage($file_path) {
    if (isset($this->storage)) {
      return $this->strorage;
    }
    return new FileStorage($file_path);
  }
}