code: def _parsePageToken(pageToken, numValues):
      
      tokens = pageToken.split(":")
      if len(tokens) != numValues:
          msg = "Invalid number of values in page token"
          raise exceptions.BadPageTokenException(msg)
      try:
          values = map(int, tokens)
      except ValueError:
          msg = "Malformed integers in page token"
          raise exceptions.BadPageTokenException(msg)
      return values
docs: Parses the specified pageToken and returns a list of the specified
      number of values. Page tokens are assumed to consist of a fixed
      number of integers seperated by colons. If the page token does
      not conform to this specification, raise a InvalidPageToken
      exception.