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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 is_fresh(self):
 # type: () -> bool """ Checks whether the lock file is still up to date with the current hash. """

        lock = self._lock.read()
        metadata = lock.get("metadata", {})

        if "content-hash" in metadata:
            return self._content_hash == lock["metadata"]["content-hash"]

        return False