if (logLevel != null) {
            cmdList.add("-Dfess.log.level=" + logLevel);
        }
        stream(fessConfig.getJvmThumbnailOptionsAsArray())
                .of(stream -> stream.filter(StringUtil::isNotBlank).forEach(value -> cmdList.add(value)));

        File ownTmpDir = null;
        final String tmpDir = System.getProperty("java.io.tmpdir");

    default String[] getJvmSuggestOptionsAsArray() {
        return JvmUtil.filterJvmOptions(getJvmSuggestOptions().split("\n"));
    }

    String getJvmThumbnailOptions();

    default String[] getJvmThumbnailOptionsAsArray() {
        return JvmUtil.filterJvmOptions(getJvmThumbnailOptions().split("\n"));
    }

    String getCrawlerDocumentHtmlPrunedTags();