public static string sha1_Parent(this ReflogEntry reflog)
 {
     if (reflog.notNull())
     {
         return(reflog.GetOldId().Name);
     }
     return(null);
 }
 public static string sha1(this ReflogEntry reflog)
 {
     if (reflog.notNull())
     {
         return(reflog.GetNewId().Name);
     }
     return(null);
 }