afterExecute() must be an instance of Magento\Framework\App\Response\Http in plugin Magento 2.4 upgrade

Question

I have a plugin in my module that was working in Magento 2.3, but after upgrade to 2.4 i am getting the error

TypeError: Argument 2 passed to ..\Plugin\Controller\Checkout\Sidebar\RemoveItemPlugin::afterExecute() must be an instance of Magento\Framework\App\Response\Http, instance of Magento\Framework\Controller\Result\Json\Interceptor given

This is the code :

use Magento\Customer\CustomerData\SectionPoolInterface;
use Magento\Framework\Serialize\Serializer\Json;
class RemoveItemPlugin
{
 public function __construct(
 SectionPoolInterface $sectionPool,
 Json $json
 ) {
 $this->sectionPool = $sectionPool;
 $this->json = $json;
 }
 public function afterExecute(
 \Magento\Checkout\Controller\Sidebar\RemoveItem $subject,
 \Magento\Framework\App\Response\Http $result
 ): \Magento\Framework\App\Response\Http {
 /* Get Cart Items */
 $sectionNames = "cart";
 $sectionNames = $sectionNames ? array_unique(\explode(',', $sectionNames)) : null;
 $forceNewSectionTimestamp = false;
 $response = $this->sectionPool->getSectionsData($sectionNames, (bool)$forceNewSectionTimestamp);
 /* Prepare Result */
 $content = $this->json->unserialize($result->getContent());
 $content['cartSection'] = $response;
 $content = $this->json->serialize($content);
 $result->setContent($content);
 return $result;
 }
}

I tried the answer in this question :

Magento 2.4 Sidebar\RemoveItem - afterExecute() must be an instance of Magento\Framework\App\Response\Http

but once I change $result to be type resultInterface, I can no longer use $result->getContent() to return the cart json. Is there a way to do this with resultInterface?

I have tried this also but i get the error invalid return type

 /* Prepare Result */
 $content = (array)$result;
 $content['cartSection'] = $response;
 $content2 = $this->json->serialize($content);
 return $content2;

Answer 1

Do -

public function afterExecute(
 \Magento\Checkout\Controller\Sidebar\RemoveItem $subject,
 $result
) { 
 // your code
 $result->setData(['key' => 'value']);
 return $result;
}

Whatever you are trying to return just pass as [] with key,value pair

Because - https://github.com/magento/magento2/blob/4c36116dcf878e127059d9be9566a119783583f2/app/code/Magento/Checkout/Controller/Sidebar/RemoveItem.php#L111 and https://github.com/magento/magento2/blob/4c36116dcf878e127059d9be9566a119783583f2/lib/internal/Magento/Framework/Controller/Result/Json.php#L59 will take care of data