laipower/wp-content/plugins/w3-total-cache/DbCache_WpdbBase.php

<?php
namespace W3TC;

global $wp_version;

if ( version_compare( $wp_version, '6.1-beta1', '>=' ) ) {
	require_once ABSPATH . WPINC . '/class-wpdb.php';
} else {
	require_once ABSPATH . WPINC . '/wp-db.php';
}

class DbCache_WpdbBase extends \wpdb {
}