set_property( 'label', __( 'Twitter Username', 'wordpress-seo' ) ); } /** * Set adapter * * @param WPSEO_Configuration_Options_Adapter $adapter Adapter to register lookup on. */ public function set_adapter( WPSEO_Configuration_Options_Adapter $adapter ) { $adapter->add_option_lookup( $this->get_identifier(), 'twitter_site' ); } }