enqueue_tutorials_scripts(); } /** * Render page header. */ public function render_page_header() { $tutorials = add_query_arg( array( 'utm_source' => 'smush', 'utm_medium' => 'plugin', 'utm_campaign' => 'smush_tutorials_page', ), esc_url( 'https://wpmudev.com/blog/tutorials/tutorial-category/smush-pro/' ) ); ?>