/** The key of the configuration. e.g. http,https */
    String CRAWLER_WEB_PROTOCOLS = "crawler.web.protocols";

    /** The key of the configuration. e.g. file,smb,smb1,ftp,storage,s3,gcs */
    String CRAWLER_FILE_PROTOCOLS = "crawler.file.protocols";

    /** The key of the configuration. e.g. ^FESS_ENV_.* */
    String CRAWLER_DATA_ENV_PARAM_KEY_PATTERN = "crawler.data.env.param.key.pattern";