load Extractor
suspend fun loadExtractor(url: String, subtitleCallback: (SubtitleFile) -> Unit, callback: (ExtractorLink) -> Unit): Boolean(source)
suspend fun loadExtractor(url: String, referer: String? = null, subtitleCallback: (SubtitleFile) -> Unit, callback: (ExtractorLink) -> Unit): Boolean(source)
Tries to load the appropriate extractor based on link, returns true if any extractor is loaded.