build_external_link( 'https://www.exactmetrics.com/addon/google-optimize/' ) . '" target="_blank">', '', '', '' ); $notification['btns'] = array( "get_exactmetrics_pro" => array( 'url' => $this->get_upgrade_url(), 'text' => __( 'Get ExactMetrics Pro', 'google-analytics-dashboard-for-wp' ), 'is_external' => true, ), ); return $notification; } } // initialize the class new ExactMetrics_Notification_Upgrade_For_Google_Optimize();