/**
  * Method to set fields as read only, when the depend on some features 
  * that are enabled
  * @since 0.85+2.4.0
  */
 static function addReadOnlyFields(PluginGenericobjectType $type)
 {
     global $GO_READONLY_FIELDS;
     if ($type->canBeReserved()) {
         $GO_READONLY_FIELDS[] = 'users_id';
         $GO_READONLY_FIELDS[] = 'locations_id';
     }
     if ($type->canUseGlobalSearch()) {
         $GO_READONLY_FIELDS[] = 'serial';
         $GO_READONLY_FIELDS[] = 'otherserial';
         $GO_READONLY_FIELDS[] = 'locations_id';
         $GO_READONLY_FIELDS[] = 'states_id';
         $GO_READONLY_FIELDS[] = 'users_id';
         $GO_READONLY_FIELDS[] = 'groups_id';
         $GO_READONLY_FIELDS[] = 'manufacturers_id';
         $GO_READONLY_FIELDS[] = 'users_id_tech';
     }
 }