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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 _sync_code(self):
 """Syncs the current state of self.lines with self.code, the serializable string representing the set of code. """

        new_code = []
        for line in self.lines:
            if isinstance(line, CodeAnswer):
                new_code.append(line.dump())
            else:
                new_code.append(line)
        self.code = '\n'.join(new_code)