Falcon::is_network_mode PHP Method

    public static function is_network_mode()
    {
        require_once ABSPATH . 'wp-admin/includes/plugin.php';
        return is_multisite() && is_plugin_active_for_network(FALCON_PLUGIN);
    }

 public static function register_default_settings()
 {
     if (Falcon::is_network_mode()) {
         self::register_network_settings();
     }
     add_settings_section('bbsub_options_notifications', 'Default Notification Settings', array(get_class(), 'output_default_settings_header'), 'bbsub_options');
     $connectors = Falcon::get_connectors();
     foreach ($connectors as $type => $connector) {
         if (!is_callable(array($connector, 'get_available_settings'))) {
             continue;
         }
         $args = array('type' => $type, 'connector' => $connector);
         add_settings_field('falcon_options_notifications-' . $type, $connector->get_name(), array(get_class(), 'output_default_settings'), 'bbsub_options', 'bbsub_options_notifications', $args);
         $available = $connector->get_available_settings();
         self::$available[$type] = $available;
         foreach ($available as $key => $title) {
             $setting_key = self::key_for_setting($type, 'notifications.' . $key);
             register_setting('bbsub_options', $setting_key);
             // Add the filter ourselves, so that we can specify two params
             add_filter("sanitize_option_{$setting_key}", array(get_class(), 'sanitize_notification_option'), 10, 2);
             // Save the key for later
             self::$registered_settings[$setting_key] = array($type, $key);
         }
     }
 }