/**
  * Set roles on $acl object
  *
  * @param Acl $acl
  */
 public function set_roles($acl)
 {
     foreach ($this->_environments as $environment) {
         // create managers for all websites
         $this->_roles['manager_' . $environment] = array('member');
         // let staff inherit from all managers
         $this->_roles['staff'][] = 'manager_' . $environment;
     }
     foreach ($this->_roles as $role => $inheritance) {
         $acl->add_role($role, $inheritance);
     }
 }
 /**
  * Set roles on $acl object
  *
  * @param Acl $acl
  */
 public function set_roles($acl)
 {
     foreach ($this->_roles as $role => $inheritance) {
         $acl->add_role($role, $inheritance);
     }
 }