code: def __collect_trace_data(self, request, response, error, latency):
          
  
          data = OrderedDict()
          data['latency'] = latency.elapsed
          data['request_method'] = request.environ['REQUEST_METHOD']
          data['request_url'] = request.url
          data['request_headers'] = request.headers
  
          body = request.get_data(as_text=True)
          if body:
              data['request_body'] = body
  
          if response:
              data['response_status'] = response.status_code
  
          if error:
              data['error'] = str(error)
  
          return data
docs: Collects the tracing data from the given parameters.
          :param request: The Flask request.
          :param response: The flask response.
          :param error: The error occurred if any.
          :param latency: The time elapsed to process the request.
          :return: The tracing data.