@SuppressWarnings("nls")
    private String toString(Collection<?> collection, int maxLen) {
        StringBuilder builder = new StringBuilder();
        builder.append("[");
        int i = 0;
        for (Iterator<?> iterator = collection.iterator(); iterator.hasNext() && i < maxLen; i++) {
            if (i > 0)
                builder.append(", ");
            builder.append(iterator.next());
        }
        builder.append("]");
        return builder.toString();
    }
@param userId the userId to set
manager/api/beans/src/main/java/io/apiman/manager/api/beans/audit/data/MembershipData.java