protected function getConfigurationKeysAndValues(PropertyMappingConfigurationInterface $configuration, array $configurationKeys)
    {
        $keysAndValues = [];
        foreach ($configurationKeys as $configurationKey) {
            $keysAndValues[$configurationKey] = $configuration->getConfigurationValue(FloatConverter::class, $configurationKey);
        }
        return $keysAndValues;
    }