Debugging for rclone go library

How do I turn on debugging if I'm using rclone as go library. I went through the code, but it seems client can't provide custom ConfigInfo into NewFs() function (which is where we specify debug config).
Issue I'm trying to debug: Connection lost error only for S3 and it looks like problem with concurrency.

Below is a sample code I'm using:

sftpConfig = configmap.Simple{
"type": "sftp",
"host": "sftp.testhost.com",
"port": "22",
"user": "testuser",
"pass": obscure.MustObscure("pass"),
"upload_path": "upload",
"subsystem": "sftp",
}

fs, err := sftp.NewFs(context.Background(),"sftp", path, config)
if err != nil {
return err
}

objectInfo := object.NewStaticObjectInfo("filename", now, int64(len(content)), true, nil, fs)
obj, err := targetFs.Put(context.Background(), bytes.NewReader(report), objectInfo)
if err != nil {
return err
}

What you want to do is set the LogLevel. There is an example for the rc which should translate into using the library directly.