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

    protected function getConvertersForInterfaces(array $convertersForSource, array $interfaceNames)
    {
        $convertersForInterface = [];
        foreach ($interfaceNames as $implementedInterface) {
            if (isset($convertersForSource[$implementedInterface])) {
                foreach ($convertersForSource[$implementedInterface] as $priority => $converter) {
                    if (isset($convertersForInterface[$priority])) {
                        throw new DuplicateTypeConverterException('There exist at least two converters which handle the conversion to an interface with priority "' . $priority . '". ' . get_class($convertersForInterface[$priority]) . ' and ' . get_class($converter), 1297951338);
                    }
                    $convertersForInterface[$priority] = $converter;
                }
            }
        }
        return $convertersForInterface;
    }