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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 _validate_gain_A_value(self, gain_A):
 """ validate a given value for gain_A :type gain_A: int :raises: ValueError """

        if gain_A not in self._valid_gains_for_channel_A:
            raise ParameterValidationError("{gain_A} is not a valid gain".format(gain_A=gain_A))