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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 responses_callback(request):
 """Responses Request Handler. Converts a call intercepted by Responses to the Stack-In-A-Box infrastructure :param request: request object :returns: tuple - (int, dict, string) containing: int - the HTTP response status code dict - the headers for the HTTP response string - HTTP string response """

    method = request.method
    headers = CaseInsensitiveDict()
    request_headers = CaseInsensitiveDict()
    request_headers.update(request.headers)
    request.headers = request_headers
    uri = request.url
    return StackInABox.call_into(method,
                                 request,
                                 uri,
                                 headers)