public function getCurrentConfigVariableByName($variableKey)
    {
        if (! isset($this->currentConfigVariables[$variableKey])) {
            throw new ObjectMappingException(
                sprintf(
                    'The current config variables do not contains key "%s". Availables keys are "[%s]".',
                    $variableKey,
                    implode(',', array_keys($this->currentConfigVariables))
                )
            );
        }
        
        return $this->currentConfigVariables[$variableKey];
    }