Title length

Hello

Please, I’d like to know how can I limit the title length of the imported posts?

I saw the code below, but I can’t figure out where to add it.

Thanks

James

add_filter( 'dsgnwrks_instagram_pre_save', 'dsgnwrks_qa_make_title_excerpted' );
function dsgnwrks_qa_make_title_excerpted( $import ) {

if ( isset( $import['post_title'] ) ) {

// feel free to edit these 2 values
$number_of_words = 5;
$more = '...';

$import['post_title'] = wp_trim_words( $import['post_title'], $number_of_words, $more );
}

return $import;
}

https://wordpress.org/plugins/dsgnwrks-instagram-importer/