listMyExtensions example

public function load(ExtensionCollection $localCollection, Context $context): ExtensionCollection
    {
        $this->addUpdateInformation($localCollection, $context);
        $this->addStoreInformation($localCollection, $context);

        return $this->sortCollection($localCollection);
    }

    private function addStoreInformation(ExtensionCollection $localCollection, Context $context): void
    {
        try {
            $storeExtensions = $this->client->listMyExtensions($localCollection, $context);
        } catch (\Throwable) {
            return;
        }

        foreach ($storeExtensions->getElements() as $storeExtension) {
            if ($localCollection->has($storeExtension->getName())) {
                /** @var ExtensionStruct $localExtension */
                $localExtension = $localCollection->get($storeExtension->getName());
                $localExtension->setId($storeExtension->getId());
                $localExtension->setIsTheme($storeExtension->isTheme());
                $localExtension->setStoreExtension($storeExtension);