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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 manufacturer(self):
 """Returns the name of the manufacturer of the device. Args: self (JLinkDeviceInfo):
 the ``JLinkDeviceInfo`` instance Returns: Manufacturer name. """

        buf = ctypes.cast(self.sManu, ctypes.c_char_p).value
        return buf.decode() if buf else None