public Integer getTagPosition(final String tagName) {
        return timeAgnosticStatisticEvent.getTagPosition(tagName);
    }
@param tagName The name of the tag in a {@link StatisticTag} object
@return The position of the tag in the tag list (0 based)
stroom-statistics/stroom-statistics-impl-sql/src/main/java/stroom/statistics/impl/sql/StatisticEvent.java