code: def get_uuid_string(low=None, high=None, **x):
      
      if low is None or high is None:
          return None
      x = ''.join([parse_part(low), parse_part(high)])
      return '-'.join([x[:8], x[8:12], x[12:16], x[16:20], x[20:32]])
docs: This method parses a UUID protobuf message type from its component
      'high' and 'low' longs into a standard formatted UUID string
  
      Args:
          x (dict): containing keys, 'low' and 'high' corresponding to the UUID
              protobuf message type
  
      Returns:
          str: UUID formatted string