Why doesn't $basket->getExistsItem('catalog', $productId) work in bitrix?

Question

1C-Bitrix

I try to check the existence of a product in the cart using the product id, it does not work.
$basket->getExistsItem('catalog', $productId)
How to extract an item from the basket by product id? Does $basket have a method for doing this, without having to manually iterate through all the elements of the basket and compare.

Answer 1

Here I explained in detail what and how in this method (read the comments too) link