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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 title(self, value: typing.Union[None, str]):
 """ Modifies the title of the project, which is initially loaded from the `cauldron.json` file. """

        if not self._project:
            raise RuntimeError('Failed to assign title to an unloaded project')
        self._project.title = value