I'm trying to set Custom Sort Order in Collection using afterSetCollection()

Following is my code di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    <type name="Magento\Catalog\Block\Product\ProductList\Toolbar">
        <plugin name="sortby_extend_default_sort_filters" type="Package\Module\Plugin\Toolbar" sortOrder="99" />

Following is my Toolbar.php

    public function afterSetCollection($collection, \Magento\Catalog\Block\Product\ProductList\Toolbar $result)
            $collection = $result->getCollection();
            $currentOrder = $result->getCurrentOrder();
            $currentDirection = $result->getCurrentDirection();
            if ($currentOrder && $currentOrder == 'price') {
                $result->getCollection()->getSelect()->order(new \Zend_Db_Expr('new_price ' . $currentDirection));
                //Following is also not working
            return $result;

When I try to print select query in list.phtml I get sorting only for follwoing

 `e`.`entity_id` DESC

Can anyone suggest, Why my sorting not applied?

FYI : new_price is created on the fly which working properly in aroundSetCollection() but not working for afterSetCollection()


I found that in another(in afterSetCollection()) file following code was given


Due this it was not working.

Removing above line has solved issue for me.

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