public void StopTopicImport(string uid)
{
if (uid == null)
{
throw new ArgumentNullException(nameof(uid));
}
lock (Importers)
{
if (Importers.TryGetValue(uid, out var importer))
{
importer.Stop();
_logger.Log(LogLevel.Information, "Stopped importer '{0}'.");
}
Importers.Remove(uid);
}
}