亲测无效

<?php    //Checking User logedin or not              $objectManager       = \Magento\Framework\App\ObjectManager::getInstance();    $context             = $objectManager->get('Magento\Framework\App\Http\Context');    $isLoggedIn          = $context->getValue(\Magento\Customer\Model\Context::CONTEXT_AUTH);    $customerSession     = $objectManager->create("Magento\Customer\Model\Session");    if($customerSession->isLoggedIn()){      //getting customer ID      $id =  $customerSession->getCustomerID();    }    //Getting wishlist products Collections  Related to Customers    $wishlist            = $objectManager->get('\Magento\Wishlist\Model\Wishlist');    $wishlist_collection = $wishlist->loadByCustomerId( $id , true)->getItemCollection();    $_in_wishlist        = "false";    foreach ($wishlist_collection as $wishlist_product):      if($_product->getId() == $wishlist_product->getProduct()->getId()){        $_in_wishlist = "true";        break;      }      endforeach;      if($_in_wishlist == "true"): ?>        <div class="addtowishlist added"  style="font-family: Raleway"><span>Already Added to Wishlist:</span><div data-role="add-to-links" class="actions-secondary"<?= strpos($pos, $viewMode . '-secondary') ? $position : '' ?>>        <?php if ($addToBlock = $block->getChildBlock('addto')): ?>          <?= $addToBlock->setProduct($_product)->getChildHtml() ?>        <?php endif; ?>             </div>        </div>        <?php else: ?>          <div class="addtowishlist"  style="font-family: Raleway"><span>Add to Wishlist:</span><div data-role="add-to-links" class="actions-secondary"<?= strpos($pos, $viewMode . '-secondary') ? $position : '' ?>>          <?php if ($addToBlock = $block->getChildBlock('addto')): ?>            <?= $addToBlock->setProduct($_product)->getChildHtml() ?>          <?php endif; ?>             </div>          </div>        <?php endif; ?>