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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 flush(self):
 """Flushes the queued up telemetry to the service. """

        if self._requests_middleware:
            self._requests_middleware.flush()

        if self._trace_log_handler:
            self._trace_log_handler.flush()

        if self._exception_telemetry_client:
            self._exception_telemetry_client.flush()