Neos\Flow\Property\PropertyMapper::prepareTypeConverterMap PHP Method

    protected function prepareTypeConverterMap()
    {
        $typeConverterMap = [];
        $typeConverterClassNames = static::getTypeConverterImplementationClassNames($this->objectManager);
        foreach ($typeConverterClassNames as $typeConverterClassName) {
            $typeConverter = $this->objectManager->get($typeConverterClassName);
            foreach ($typeConverter->getSupportedSourceTypes() as $supportedSourceType) {
                if (isset($typeConverterMap[$supportedSourceType][$typeConverter->getSupportedTargetType()][$typeConverter->getPriority()])) {
                    throw new Exception\DuplicateTypeConverterException('There exist at least two converters which handle the conversion from "' . $supportedSourceType . '" to "' . $typeConverter->getSupportedTargetType() . '" with priority "' . $typeConverter->getPriority() . '": ' . get_class($this->typeConverters[$supportedSourceType][$typeConverter->getSupportedTargetType()][$typeConverter->getPriority()]) . ' and ' . get_class($typeConverter), 1297951378);
                }
                $typeConverterMap[$supportedSourceType][$typeConverter->getSupportedTargetType()][$typeConverter->getPriority()] = $typeConverterClassName;
            }
        }
        return $typeConverterMap;
    }