public Map<String, Object> getEndTitleRollMap() {
        return getEndTitleRoll().map(roll -> roll.getDataMap()).orElse(Collections.emptyMap());
    }
public Map < String , Object > getEndTitleRollMap ( ) { return getEndTitleRoll ( ) . map ( roll -> roll . getDataMap ( ) ) . orElse ( Collections . emptyMap ( ) ) ; }
@return The read-only map of end-title-roll. (NotNull, EmptyAllowed: when e.g. not found)