text: 
  """ General utilities. """
  
  __all__ = ["uri"]
  
  def uri(end_point, host, version, scheme):
      r"""
      Return the unique resource identifier for the requested end point, host,
      version, and scheme.
      
      :param end_point:
          The application end point (e.g., "connect/token" or "properties").
  
      :param host:
          The remote host (e.g., "api.domain.com.au").
  
      :param version:
          The API version (e.g., "v1").
  
      :param scheme:
          The connection scheme (e.g., "https").
      """
      return f"{scheme}://{host}/{version}/{end_point}"
  