protected function getMappedPropelType($nativeType)
    {
        if (null === $this->nativeToPropelTypeMap) {
            $this->nativeToPropelTypeMap = $this->getTypeMapping();
        }

        if (isset($this->nativeToPropelTypeMap[$nativeType])) {
            return $this->nativeToPropelTypeMap[$nativeType];
        }

        return null;
    }