public static boolean isEventIdFieldName(final String fieldName) {
        return Objects.equals(DEFAULT_EVENT_ID_FIELD_NAME, fieldName)
                || Objects.equals(FALLBACK_EVENT_ID_FIELD_NAME, fieldName);
    }
@return True if fieldName matches the special Event ID field.
stroom-query/stroom-query-language/src/main/java/stroom/query/language/functions/FieldIndex.java