public static function enumRegions()
    {
        return array(
            'us-east-1'      => 'US East (N. Virginia)',
            'us-east-2'      => 'US East (Ohio)',
            'us-west-1'      => 'US West (N. California)',
            'us-west-2'      => 'US West (Oregon)',
            'af-south-1'     => 'Africa (Cape Town)',
            'ap-east-1'      => 'Asia Pacific (Hong Kong)',
            'ap-south-1'     => 'Asia Pacific (Mumbai)',
            'ap-northeast-3' => 'Asia Pacific (Osaka-Local)',
            'ap-northeast-2' => 'Asia Pacific (Seoul)',
            'ap-southeast-1' => 'Asia Pacific (Singapore)',
            'ap-southeast-2' => 'Asia Pacific (Sydney)',
            'ap-northeast-1' => 'Asia Pacific (Tokyo)',
            'ca-central-1'   => 'Canada (Central)',
            'cn-north-1'     => 'China (Beijing)',
            'cn-northwest-1' => 'China (Ningxia)',
            'eu-central-1'   => 'EU (Frankfurt)',
            'eu-west-1'      => 'EU (Ireland)',
            'eu-west-2'      => 'EU (London)',
            'eu-south-1'     => 'EU (Milan)',
            'eu-west-3'      => 'EU (Paris)',
            'eu-north-1'     => 'EU (Stockholm)',
            'me-south-1'     => 'Middle East (Bahrain)',
            'sa-east-1'      => 'South America (São Paulo)',
            'us-gov-east-1'  => 'AWS GovCloud (US-East)',
            'us-gov-west-1'  => 'AWS GovCloud (US-West)',
        );
    }