src/Mapper/DbSettingsMapper.php
protected function getWhereFromParameter(ParameterInterface $parameter)
    {
        if ($parameter instanceof IdAwareParameterInterface && $parameter->getId()) {
            return ['id' => $parameter->getId()];
        } else {
            return ['namespace' => $parameter->getNamespace(), 'name' => $parameter->getName()];
        }
    }
protected function getWhereFromParameter(ParameterInterface $parameter)
    {
        if ($parameter instanceof IdAwareParameterInterface && $parameter->getId()) {
            return ['id' => $parameter->getId()];
        } else {
            return ['namespace' => $parameter->getNamespace(), 'name' => $parameter->getName()];
        }
    }
Gets where condition of select, update or delete a parameter

@param  ParameterInterface $parameter
@return array