public async Task <bool> Handle(UpdateSource request, CancellationToken cancellationToken)
        {
            _context.Entry(request.Source).State = EntityState.Modified;
            await _context.SaveChangesAsync(cancellationToken);

            return(true);
        }
 public void Update(T obj)
 {
     _table.Attach(obj);
     _context.Entry(obj).State = EntityState.Modified;
 }