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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 _load_data_flow_models(self):
 """ Adds models for each data flow of the state """

        self.data_flows = []
        for data_flow in self.state.data_flows.values():
            self._add_model(self.data_flows, data_flow, DataFlowModel)