human
Solve the following python programming problem given the following code:
def _AddMockJSONResponse(mock_client, url, response_dict) : 
    'Add a mapping entry to the mock client such that requests to
  "url" will return an HTTP response containing the JSON-formatted
  "response_dict".
  ' 
    def _CreateResponse(request) : 
        return httpclient.HTTPResponse (request, 200, headers = { 
            'Content-Type' : 'application/json', 
}, buffer = StringIO (json.dumps (response_dict))) 
mock_client.map (url, mock_client) 

    
    

    Fix the buggy line: mock_client.map (url, mock_client)
assistant
#Here is Python code to fix the buggy line: mock_client.

mock_client.map (url, def _CreateResponse()