@Override
    public String toString() {
        return new StringJoiner(", ", KeyValueTagDto.class.getSimpleName() + "[", "]")
                .add("key='" + key + "'")
                .add("value='" + value + "'")
                .toString();
    }
A KV tag pair DTO.

@author Marc Savy {@literal <marc@blackparrotlabs.io>}
manager/api/beans/src/main/java/io/apiman/manager/api/beans/apis/dto/KeyValueTagDto.java