code: func (r Network_Vlan_Firewall) IsHighAvailabilityUpgradeAvailable() (resp bool, err error) {
  	err = r.Session.DoRequest("SoftLayer_Network_Vlan_Firewall", "isHighAvailabilityUpgradeAvailable", nil, &r.Options, &resp)
  	return
  }
docs: // Whether this firewall qualifies for High Availability upgrade.