fenzo-triggers/src/main/java/com/netflix/fenzo/triggers/persistence/AbstractInMemoryDao.java
protected String createId(String group, String id) {
        if (group == null || id == null || group.contains(idSeparator) || id.contains(idSeparator)) {
            throw new IllegalArgumentException(String.format("Illegal arguments specified for column name creation (group = %s, id = %s)", group, id));
        }
        return String.format("%s%s%s", group, idSeparator, id);
    }
protected String createId(String group, String id) {
        if (group == null || id == null || group.contains(idSeparator) || id.contains(idSeparator)) {
            throw new IllegalArgumentException(String.format("Illegal arguments specified for column name creation (group = %s, id = %s)", group, id));
        }
        return String.format("%s%s%s", group, idSeparator, id);
    }
@warn method description missing
@warn parameter descriptions missing
@warn exception IllegalArgumentException description missing

@param group
@param id
@return
@throws IllegalArgumentException