public void setCustomRollUpMasks(final Set<CustomRollUpMask> customRollUpMasks) {
        this.customRollUpMasks = customRollUpMasks;
    }
Held in a set to prevent duplicates.
<p>
XMLTransient to force JAXB to use the setter
stroom-core-shared/src/main/java/stroom/statistics/impl/sql/shared/StatisticsDataSourceData.java