How to make autocomplete scss in scss files for bem?

Hi. 
I have this php code, but may be and html. 

<div class="partners">
    <div class="container">
        <h2 class="partners__title title"><?php echo $title; ?></h2>
        <div class="partners__text">
            <p><?php echo $text; ?></p>
        </div>
        <div class="partners__wrap">
            <?php foreach ($items as $item): ?>
                <div class="partners__item">
                    <img src="<?php echo $item; ?>" alt="">
                </div>
            <?php endforeach; ?>
        </div>
    </div>
</div>

And scss file, where don't have autocomplete.

.partners {
  &__
}