SubscriptionStatusLabel.php

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<?php
namespace Magento\Analytics\Block\Adminhtml\System\Config;

use Magento\Analytics\Model\SubscriptionStatusProvider;
use Magento\Backend\Block\Template\Context;

class SubscriptionStatusLabel extends \Magento\Config\Block\System\Config\Form\Field
{
    private $subscriptionStatusProvider;

    public function __construct(
        Context $context,
        SubscriptionStatusProvider $labelStatusProvider,
        array $data = []
    ) {
        parent::__construct($context, $data);
        $this->subscriptionStatusProvider = $labelStatusProvider;
    }

    public function render(\Magento\Framework\Data\Form\Element\AbstractElement $element)
    {
        $element->setData(
            'comment',
            $this->prepareLabelValue()
        );
        return parent::render($element);
    }

    private function prepareLabelValue()
    {
        return __('Subscription status') . ': ' . $this->subscriptionStatusProvider->getStatus();
    }
}