Magento 2: get child product of current configurable product

<?php
    $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
    $product = $objectManager->get('Magento\Framework\Registry')->registry('current_product');//get current product
    $productTypeInstance = $product->getTypeInstance();
    $usedProducts = $productTypeInstance->getUsedProducts($product);

    echo $product->getId(); //Main configurable product ID
    echo $product->getName(); //Main Configurable Name

    foreach ($usedProducts as $child) {
        echo $child->getId()."</br>"; //Child Product Id
        echo $child->getName()."</br>"; //Child Product Name
    }?>

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