code: public static function addClasses($classes)
  	{
  		@trigger_error('Using ClassLoader::addClasses() has been deprecated and will no longer work in Contao 5.0.', E_USER_DEPRECATED);
  
  		foreach ($classes as $class=>$file)
  		{
  			self::addClass($class, $file);
  		}
  	}
docs: Add multiple new classes with their file paths
  
  @param array $classes An array of classes
  
  @deprecated Deprecated since Contao 4.2, to be removed in Contao 5.