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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 _traceable(self, wv):
 """Check if wv is able to be traced If it is traceable due to a probe, record that probe in _probe_mapping. """

        if isinstance(wv, (Input, Output)):
            return True
        for net in self.block.logic:
            if net.op == 'w' and net.args[0].name == wv.name and isinstance(net.dests[0], Output):
                self._probe_mapping[wv.name] = net.dests[0].name
                return True
        return False