/**
  * The Symfony ClassLoader does not support class maps.
  */
 public function addClassMap(array $classMap)
 {
     if ($this->classMap) {
         $this->classMap = array_merge($this->classMap, $classMap);
     } else {
         $this->classMap = $classMap;
     }
     // Set the parent's $map variable.
     parent::__construct($this->classMap);
 }