def METHOD_NAME(space_group_info, file_iter):
  given_space_group_number = space_group_info.type().number()
  for line in file_iter:
    flds = line.split(None, 4)
    space_group_number = int(flds[0][-3:])
    order_z = int(flds[1])
    if (space_group_number != given_space_group_number):
      for i in range(order_z):
        next(file_iter)
    else:
      result = flds[3]
      group = collect_symops(file_iter=file_iter, order_z=order_z)
      if (space_group_info.group() == group):
        return result
  return None