Acl_Core::roles PHP Method

    public function roles($name)
    {
        // Add this role to the set
        $roles = array($name);
        if (isset($this->_roles[$name])) {
            foreach ($this->_roles[$name] as $role) {
                // Inherit parents
                $roles = array_merge($this->roles($role), $roles);
            }
        }
        return $roles;
    }