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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 is_state(self, state):
 """ Test if this conversation is in the given state. """

        state = state.format(relation_name=self.relation_name)
        value = _get_flag_value(state)
        if not value:
            return False
        return self.key in value['conversations']