public Builder conditionSet(final ConditionSet conditionSet) {
            this.conditionSet = conditionSet;
            return this;
        }
A {@link QueryField} for a {@link stroom.docref.DocRef} type whose names are NOT unique.
The {@link stroom.docref.DocRef} uuid is used as the value in expression terms for a unique
match. Other conditions are not supported as that would require the user to enter uuids,
and it is not clear in the UI whether they are dealing in UUIDs or names.
stroom-query/stroom-query-api/src/main/java/stroom/query/api/datasource/QueryField.java