code: def create_header(self, service_id, version_number, name, destination, source, _type=FastlyHeaderType.RESPONSE, action=FastlyHeaderAction.SET, regex=None, substitution=None, ignore_if_set=None, priority=10, response_condition=None, cache_condition=None, request_condition=None):
  		body = self._formdata({
  			"name": name,
  			"dst": destination,
  			"src": source,
  			"type": _type,
  			"action": action,
  			"regex": regex,
  			"substitution": substitution,
  			"ignore_if_set": ignore_if_set,
  			"priority": priority,
  			"response_condition": response_condition,
  			"request_condition": request_condition,
  			"cache_condition": cache_condition,
  		}, FastlyHeader.FIELDS)
  		
  		content = self._fetch("/service/%s/version/%d/header" % (service_id, version_number), method="POST", body=body)
  		return FastlyHeader(self, content)
docs: Creates a new Header object.