Controller/BlueimpController.php
public function handleManualUpload($file, ResponseInterface $response, Request $request = null)
    {
        if (!$request) {
            $request = new Request();
        }
        $this->setRequest($request);
        $this->handleUpload($file, $response, $request);
        $files = $response->assemble();
        if (0 === count($files)) {
            throw new \UnexpectedValueException('File upload returned empty response');
        }

        return array_pop($files);
    }
public function handleManualUpload($file, ResponseInterface $response, Request $request = null)
    {
        if (!$request) {
            $request = new Request();
        }
        $this->setRequest($request);
        $this->handleUpload($file, $response, $request);
        $files = $response->assemble();
        if (0 === count($files)) {
            throw new \UnexpectedValueException('File upload returned empty response');
        }

        return array_pop($files);
    }
@param FileInterface|HttpFile $file
@param ResponseInterface      $response
@param Request|null           $request

@throws \UnexpectedValueException

@return ResourceInterface