code: protected long getBufferFlushtime(Dsn dsn) {
          return Util.parseLong(Lookup.lookup(BUFFER_FLUSHTIME_OPTION, dsn), BUFFER_FLUSHTIME_DEFAULT);
      }
docs: How long to wait between attempts to flush the disk buffer, in milliseconds.
  
  @param dsn Sentry server DSN which may contain options.
  @return ow long to wait between attempts to flush the disk buffer, in milliseconds.