/**
 
* Associations with visibility
 
* UML User Guide p. 145
 
*
 
* @opt horizontal
 
* @hidden
 
*/

class UMLOptions {}

/** @assoc * - "*\n\n+user " User */
class UserGroup {}

/** @navassoc "1\n\n+owner\r" - "*\n\n+key" Password */
class User{}

class Password{}