public void setSupportedConditions(final List<Condition> supportedConditions) {
        if (supportedConditions == null) {
            this.supportedConditions = null;
        } else {
            this.supportedConditions = new ArrayList<>(supportedConditions);
        }
    }
Defines a list of the {@link Condition} values supported by this field,
can be null in which case a default set will be returned. Not persisted
in the XML
stroom-legacy/stroom-legacy-model_6_1/src/main/java/stroom/legacy/model_6_1/IndexField.java