public EpicComebackHandler(IAchievementGainer gainer) : base(gainer)
 {
 }
 public DominatingHandler(IAchievementGainer gainer) : base(gainer)
 {
 }
 public WorkaholicHandler(IAchievementGainer gainer) : base(gainer)
 {
 }
 public TrackResultHandler(IAchievementGainer gainer)
 {
     this._gainer = gainer;
 }