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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 GET_savedparameteritemvalues(self) -> None: """Get the previously saved values of those |ChangeItem| objects which are handling |Parameter| objects."""

        dict_ = state.parameteritemvalues.get(self._id)
        if dict_ is None:
            self.GET_parameteritemvalues()
        else:
            for name, value in dict_.items():
                self._outputs[name] = value