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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 optimize(self, sensor_graph, model):
 """Optimize a sensor graph by running optimization passes. The passes are run one at a time and modify the sensor graph for future passes. Args: sensor_graph (SensorGraph):
 The graph to be optimized model (DeviceModel):
 The device that we are optimizing for, that OptimizationPass objects are free to use to guide their optimizations. """


        passes = self._order_pases(self._known_passes.keys())

        for opt_name in passes:
            rerun = True
            pass_instance = self._known_passes[opt_name][0]()

            while rerun:
                rerun = pass_instance.run(sensor_graph, model=model)