def METHOD_NAME(self):
    self.extensions = None
    if self.config.get("enable_extension_filter"):
        extension_filter = self.config.get("extension_filter")
        self.extensions = [s.strip() for s in extension_filter.split(",")]
        self.log_info(
            self._("Watching only for extensions {}").format(self.extensions)
        )
    interval = max(self.config.get("interval"), 20)
    self.periodical.start(interval, threaded=True)