@Override
    public String toString() {
        return "ClientQuotaFilterComponent(entityType=" + entityType + ", match=" + match + ")";
    }
@return the optional match string, where:
        if present, the name that's matched exactly
        if empty, matches the default name
        if null, matches any specified name
clients/src/main/java/org/apache/kafka/common/quota/ClientQuotaFilterComponent.java