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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 get_parallel_value_for_key(self, key):
 """ Get the value for a key. If there is no value for the key then empty string is returned. """

        if self._remotelib:
            return self._remotelib.run_keyword('get_parallel_value_for_key',
                                               [key], {})
        return _PabotLib.get_parallel_value_for_key(self, key)