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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 wrap_passthrough(self, text, multiline=True):
 """Wrap a passthrough."""

        if not multiline:
            text = text.lstrip()
        if multiline:
            out = "\\"
        else:
            out = "\\\\"
        out += self.add_ref("passthrough", text) + unwrapper
        if not multiline:
            out += "\n"
        return out