/**
  * Initialize Paymill library with $config arguments
  */
 function initialize($config = array())
 {
     extract($config);
     if (isset($config['paymill_test']) && !$config['paymill_test'] || !isset($config['paymill_test'])) {
         self::$apiKey = $config['paymill_apiKey'];
         self::$apiEndPoint = $config['paymill_apiEndPoint'];
     } else {
         if (isset($config['paymill_test']) && $config['paymill_test']) {
             self::$apiKey = $config['paymill_apiKey_test'];
             self::$apiEndPoint = $config['paymill_apiEndPoint_test'];
         }
     }
 }