SubmissionsSearchFetcher(api: RedditApi, subreddit: String?, query: String, limit: Long = DEFAULT_LIMIT, sorting: SearchSorting = DEFAULT_SORTING, timePeriod: TimePeriod = DEFAULT_TIMEPERIOD, showAll: Boolean = false, restrictToSubreddit: Boolean = false, disableLegacyEncoding: Boolean = false, inline getHeader: () -> HashMap<String, String>)