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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 unwrap_or(self, default: U) -> Union[T, U]: """ Returns the contained value or ``default``. Args: default: The default value. Returns: The contained value if the :py:class:`Option` is ``Some``, otherwise ``default``. Notes: If you wish to use a result of a function call as the default, it is recommnded to use :py:meth:`unwrap_or_else` instead. Examples: 0 0 """

        return self.unwrap_or_else(lambda: default)