WordPress - Jetpack: Enable lazyload Module via functions.php

Enable-lazyload-Jetpack-Module.php

<?php

/**
 * Some Jetpack modules can be manually loaded. 
 * 
 * Here's an example of how to enable Lazy Images via code instead of database.
 *
 * @see https://github.com/Automattic/jetpack/blob/593ee4cccd6aead047c72aa78378f368f084035e/modules/lazy-images.php#L27
 */
if ( defined( 'JETPACK__PLUGIN_DIR' ) ) {
	require_once( JETPACK__PLUGIN_DIR . 'modules/lazy-images/lazy-images.php' );
	add_filter( 'lazyload_is_enabled', '__return_true' );
	add_action( 'wp', array( 'Jetpack_Lazy_Images', 'instance' ) );
}