define_constants(); } protected function define_constants() { if ( ! defined( 'YAYMAIL_EXTRA_ELEMENT_ICON' ) ) { define( 'YAYMAIL_EXTRA_ELEMENT_ICON', '' ); } if ( ! defined( 'YAYMAIL_EMAIL_RENDER_PRIORITY' ) ) { define( 'YAYMAIL_EMAIL_RENDER_PRIORITY', 10 ); } } }