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I want to add the product image to bundle product page for each option. I chose to extend class \Magento\Bundle\Block\Catalog\Product\View\Type\Bundle\Option\Checkbox

This class has no __construct method, but I have to use it because I want to use \Magento\Catalog\Helper\Image. When I define a construct method, the page crashes and throws an error Call to a member function dispatch() on null

If I call parent::__construct, I receive a type error indicating the __construct methods do not match.

I have read that if the parent class does not have a __construct class, that I do not have to call parent, but in my case I cannot get this simple modification to work.

class Checkbox extends \Magento\Bundle\Block\Catalog\Product\View\Type\Bundle\Option\Checkbox {

public function __construct(
    \Magento\CatalogInventory\Api\StockRegistryInterface $stockRegistry,
    \Magento\Catalog\Helper\Image $imageHelper
){
    $this->_stockRegistry = $stockRegistry;
    $this->_imageHelper = $imageHelper;
}
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The problem is that when you extend a class that extends from another class and has no __construct method, you must use the __construct of the parent which in this case is \Magento\Bundle\Block\Catalog\Product\View\Type\Bundle\Option

This fixed my issue.

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