@Override
    public String resolveDeploymentContextbasedVipAddresses(){
        String deploymentContextBasedVipAddressesMacro = get(CommonClientConfigKey.DeploymentContextBasedVipAddresses);
        if (deploymentContextBasedVipAddressesMacro == null) {
            return null;
        }
        return getVipAddressResolver().resolve(deploymentContextBasedVipAddressesMacro, this);
    }
This class only exists to support code that depends on these constants that are deprecated now that defaults have
moved into the key.
ribbon-core/src/main/java/com/netflix/client/config/AbstractDefaultClientConfigImpl.java