Wrapper.php

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<?php
namespace Magento\Ui\Block;

use Magento\Framework\View\Element\Template;
use Magento\Framework\View\Element\UiComponentInterface;
use Magento\Ui\Model\UiComponentGenerator;

class Wrapper extends \Magento\Framework\View\Element\Template
{
    private $uiComponentGenerator;

    public function __construct(Template\Context $context, UiComponentGenerator $uiComponentGenerator, array $data = [])
    {
        parent::__construct($context, $data);
        $this->uiComponentGenerator = $uiComponentGenerator;
    }

    private function injectDataInDataSource(UiComponentInterface $uiComponent, array $widgetData)
    {
        $context = $uiComponent->getContext();
        $configData = $context->getDataProvider()->getConfigData();
        $context->getDataProvider()
            ->setConfigData(
                array_replace($configData, $widgetData)
            );
    }

    private function addDataToChildComponents(UiComponentInterface $uiComponent, array $data)
    {
        foreach ($uiComponent->getChildComponents() as $childComponent) {
            if (isset($data[$childComponent->getName()]) && is_array($data[$childComponent->getName()])) {
                $childComponent->setData(
                    'config',
                    array_replace_recursive(
                        $childComponent->getData('config'),
                        $data[$childComponent->getName()]
                    )
                );
            }

            $this->addDataToChildComponents($childComponent, $data);
        }
    }

    public function renderApp($data = [])
    {
        $uiComponent = $this->uiComponentGenerator
            ->generateUiComponent($this->getData('uiComponent'), $this->getLayout());
        $this->injectDataInDataSource($uiComponent, $this->getData());
        $this->addDataToChildComponents($uiComponent, $data);
        return (string) $uiComponent->render();
    }
}