PropertyLocker.php

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<?php
namespace Magento\Eav\Block\Adminhtml\Attribute;

use Magento\Framework\Registry;
use Magento\Eav\Model\Entity\Attribute\Config;

class PropertyLocker
{
    private $attributeConfig;

    protected $registry;

    public function __construct(
        Registry $registry,
        Config $attributeConfig
    ) {
        $this->registry = $registry;
        $this->attributeConfig = $attributeConfig;
    }

    public function lock(\Magento\Framework\Data\Form $form)
    {
        $attributeObject = $this->registry->registry('entity_attribute');
        if ($attributeObject->getId()) {
            foreach ($this->attributeConfig->getLockedFields($attributeObject) as $field) {
                if ($element = $form->getElement($field)) {
                    $element->setDisabled(1);
                    $element->setReadonly(1);
                }
            }
        }
    }
}