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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 supported_tifs(self):
 """Returns a bitmask of the supported target interfaces. Args: self (JLink):
 the ``JLink`` instance Returns: Bitfield specifying which target interfaces are supported. """

        buf = ctypes.c_uint32()
        self._dll.JLINKARM_TIF_GetAvailable(ctypes.byref(buf))
        return buf.value