code: def _parse_metadata_and_message_count(response):
      '''
      Extracts approximate messages count header.
      '''
      metadata = _parse_metadata(response)
      metadata.approximate_message_count = _to_int(response.headers.get('x-ms-approximate-messages-count'))
  
      return metadatf _parse_metadata_and_message_count(response):
      '''
      Extracts approximate messages count header.
      '''
      metadata = _parse_metadata(response)
      metadata.approximate_message_count = _to_int(response.headers.get('x-ms-approximate-messages-count'))
  
      return metadata
docs: Extracts approximate messages count header.