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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _send_success_response(self, response, start_response):
 """Sends an HTTP 200 json success response. This calls start_response and returns the response body. Args: response: A string containing the response body to return. start_response: A function with semantics defined in PEP-333. Returns: A string, the response body. """

    headers = [('Content-Type', 'application/json; charset=UTF-8')]
    return util.send_wsgi_response('200 OK', headers, response, start_response)