def ReversedDomainComponents(s):
  """Returns a list of domain components in reverse order.

  Args:
    s: (str) A string of the form "a.b.c"
  Returns:
    list(s) E.g. ['c', 'b', 'a']
  """
  if not s:
    return []
  parts = s.split('.')
  parts.reverse()
  return parts