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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 match(self, tokens, item):
 """Performs pattern-matching processing."""

        for flag, get_handler in self.matchers.items():
            if flag in tokens:
                return get_handler(self)(tokens, item)
        raise CoconutInternalException("invalid pattern-matching tokens", tokens)