 It seems that --elasticsearch-version is not use.
if request.method == 'GET' and request.args.get('arn'):
        response = {
            'TagList': [
                {
                    'Key': 'Example1',
                    'Value': 'Value'
                },
                {
                    'Key': 'Example2',
                    'Value': 'Value'
                }
            ]
        }
        return jsonify(response)
    return jsonify({})
def serve(port, quiet=True):
    generic_proxy.serve_flask_app(app=app, port=port, quiet=quiet)