new_contents: from webob.exc import HTTPClientError
  
  
  class HTTPClose(HTTPClientError):
  	"""Indicate to the front-end load balancer (FELB) that it should hang up on the client."""
  	
  	code = 499
  	title = "Client Closed Request"
  	explanation = "The server did not accept your request."
  
subject: Isolate new HTTPException subclass.