code: def _acquire_request_connection(self, request):
          '''Return a connection.'''
          host = request.url_info.hostname
          port = request.url_info.port
          use_ssl = request.url_info.scheme == 'https'
          tunnel = request.url_info.scheme != 'http'
  
          connection = yield from self._acquire_connection(host, port, use_ssl, tunnel)
  
          return connectiof _acquire_request_connection(self, request):
          '''Return a connection.'''
          host = request.url_info.hostname
          port = request.url_info.port
          use_ssl = request.url_info.scheme == 'https'
          tunnel = request.url_info.scheme != 'http'
  
          connection = yield from self._acquire_connection(host, port, use_ssl, tunnel)
  
          return connection
docs: Return a connection.