/// <summary>
/// Restores queue state from json file
/// </summary>
/// <param name="filePath">Source file path</param>
public void LoadFrom(string filePath)
{
if (System.IO.File.Exists(filePath))
{
string json = System.IO.File.ReadAllText(filePath);
FileStore fs = FileStore.FromJson(json);
_jobs = fs.Jobs;
_seq = fs.Sequence;
}
}