@Override
            public int compare(ApiGatewayBean o1, ApiGatewayBean o2) {
                return o1.getGatewayId().compareTo(o2.getGatewayId());
            }
Converts the list of gateways to a string for display/comparison.
@param gateways set of gateways
@return the gateways as a string
manager/api/rest-impl/src/main/java/io/apiman/manager/api/rest/impl/audit/AuditUtils.java