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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 drive(self):
 """Get wrapper to the drive containing this device."""

        if self.is_drive:
            return self
        cleartext = self.luks_cleartext_slave
        if cleartext:
            return cleartext.drive
        if self.is_block:
            return self._daemon[self._P.Block.Drive]
        return None