code: def _example_short_number(region_code):
      
      metadata = PhoneMetadata.short_metadata_for_region(region_code)
      if metadata is None:
          return U_EMPTY_STRING
      desc = metadata.short_code
      if desc.example_number is not None:
          return desc.example_number
      return U_EMPTY_STRING
docs: Gets a valid short number for the specified region.
  
      Arguments:
      region_code -- the region for which an example short number is needed.
  
      Returns a valid short number for the specified region. Returns an empty
      string when the metadata does not contain such information.