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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 from_context(cls):
 """Retrieve this class' instance from the current Click context. :return: Instance of this class. :rtype: Config """

        try:
            ctx = click.get_current_context()
        except RuntimeError:
            return cls()
        return ctx.find_object(cls)