Controller/Adminhtml/FastlyCdn/ImageOptimization/ListAll.php
public function execute()
    {
        $result = $this->resultJson->create();

        try {
            $activeVersion = $this->getRequest()->getParam('active_version');
            $ioOptions = $this->api->getImageOptimizationDefaultConfigOptions($activeVersion)->data->attributes;

            if (!$ioOptions) {
                return $result->setData([
                    'status'    => false,
                    'msg'       => 'Failed to fetch image optimization default config options.'
                ]);
            }

            return $result->setData([
                'status'        => true,
                'io_options'    => $ioOptions
            ]);
        } catch (\Exception $e) {
            return $result->setData([
                'status'    => false,
                'msg'       => $e->getMessage()
            ]);
        }
    }
public function execute()
    {
        $result = $this->resultJson->create();

        try {
            $activeVersion = $this->getRequest()->getParam('active_version');
            $ioOptions = $this->api->getImageOptimizationDefaultConfigOptions($activeVersion)->data->attributes;

            if (!$ioOptions) {
                return $result->setData([
                    'status'    => false,
                    'msg'       => 'Failed to fetch image optimization default config options.'
                ]);
            }

            return $result->setData([
                'status'        => true,
                'io_options'    => $ioOptions
            ]);
        } catch (\Exception $e) {
            return $result->setData([
                'status'    => false,
                'msg'       => $e->getMessage()
            ]);
        }
    }
List all image optimization default config options

@return $this|\Magento\Framework\App\ResponseInterface|\Magento\Framework\Controller\ResultInterface