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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 unregister_path(self, path):
 """ Unregisters given path. :param path: Path name. :type path: unicode :return: Method success. :rtype: bool """


        if not path in self:
            raise umbra.exceptions.PathExistsError("{0} | '{1}' path isn't registered!".format(
                self.__class__.__name__, path))

        del (self.__paths[path])
        return True