Bolt\Storage\FieldManager::setHandler PHP Method

    public function setHandler($class, $handler)
    {
        $this->handlers[$class] = $handler;
    }

 public function register(Application $app)
 {
     $app['storage.legacy'] = $app->share(function ($app) {
         return new Storage($app);
     });
     $app['storage.legacy_service'] = $app->share(function ($app) {
         return new ContentLegacyService($app);
     });
     $app['storage'] = $app->share(function ($app) {
         $storage = new EntityManager($app['db'], $app['dispatcher'], $app['storage.metadata'], $app['logger.system']);
         $storage->setLegacyStorage($app['storage.legacy']);
         $storage->setEntityBuilder($app['storage.entity_builder']);
         $storage->setFieldManager($app['storage.field_manager']);
         foreach ($app['storage.repositories'] as $entity => $repo) {
             $storage->setRepository($entity, $repo);
         }
         $storage->setDefaultRepositoryFactory($app['storage.content_repository']);
         return $storage;
     });
     $app['storage.content_repository'] = $app->protect(function ($classMetadata) use($app) {
         $repoClass = $app['storage.repository.default'];
         $repo = new $repoClass($app['storage'], $classMetadata);
         $repo->setLegacyService($app['storage.legacy_service']);
         return $repo;
     });
     $app['storage.field_manager'] = $app->share(function ($app) {
         $manager = new FieldManager();
         foreach ($app['storage.typemap'] as $field) {
             if (isset($app[$field])) {
                 $manager->setHandler($field, $app[$field]);
             }
         }
         return $manager;
     });
     $app['Bolt\\Storage\\Field\\Type\\TemplateFieldsType'] = $app->protect(function ($mapping) use($app) {
         $field = new TemplateFieldsType($mapping, $app['storage'], $app['templatechooser']);
         return $field;
     });
     $app['storage.entity_builder'] = $app->share(function ($app) {
         $builder = new Builder($app['storage.metadata'], $app['storage.field_manager']);
         return $builder;
     });
     $app['storage.repository.default'] = 'Bolt\\Storage\\Repository\\ContentRepository';
     $app['storage.typemap'] = ['Doctrine\\DBAL\\Types\\StringType' => 'Bolt\\Storage\\Field\\Type\\TextType', 'Doctrine\\DBAL\\Types\\IntegerType' => 'Bolt\\Storage\\Field\\Type\\IntegerType', 'Doctrine\\DBAL\\Types\\FloatType' => 'Bolt\\Storage\\Field\\Type\\FloatType', 'Doctrine\\DBAL\\Types\\TextType' => 'Bolt\\Storage\\Field\\Type\\TextAreaType', 'Doctrine\\DBAL\\Types\\DateType' => 'Bolt\\Storage\\Field\\Type\\DateType', 'Doctrine\\DBAL\\Types\\DateTimeType' => 'Bolt\\Storage\\Field\\Type\\DateTimeType', 'checkbox' => 'Bolt\\Storage\\Field\\Type\\CheckboxType', 'date' => 'Bolt\\Storage\\Field\\Type\\DateType', 'datetime' => 'Bolt\\Storage\\Field\\Type\\DateTimeType', 'file' => 'Bolt\\Storage\\Field\\Type\\FileType', 'filelist' => 'Bolt\\Storage\\Field\\Type\\FileListType', 'float' => 'Bolt\\Storage\\Field\\Type\\FloatType', 'geolocation' => 'Bolt\\Storage\\Field\\Type\\GeolocationType', 'hidden' => 'Bolt\\Storage\\Field\\Type\\HiddenType', 'html' => 'Bolt\\Storage\\Field\\Type\\HtmlType', 'image' => 'Bolt\\Storage\\Field\\Type\\ImageType', 'imagelist' => 'Bolt\\Storage\\Field\\Type\\ImageListType', 'integer' => 'Bolt\\Storage\\Field\\Type\\IntegerType', 'markdown' => 'Bolt\\Storage\\Field\\Type\\MarkdownType', 'relation' => 'Bolt\\Storage\\Field\\Type\\RelationType', 'repeater' => 'Bolt\\Storage\\Field\\Type\\RepeaterType', 'select' => 'Bolt\\Storage\\Field\\Type\\SelectType', 'selectmultiple' => 'Bolt\\Storage\\Field\\Type\\SelectMultipleType', 'slug' => 'Bolt\\Storage\\Field\\Type\\SlugType', 'taxonomy' => 'Bolt\\Storage\\Field\\Type\\TaxonomyType', 'templatefields' => 'Bolt\\Storage\\Field\\Type\\TemplateFieldsType', 'templateselect' => 'Bolt\\Storage\\Field\\Type\\TemplateSelectType', 'text' => 'Bolt\\Storage\\Field\\Type\\TextType', 'textarea' => 'Bolt\\Storage\\Field\\Type\\TextAreaType', 'video' => 'Bolt\\Storage\\Field\\Type\\VideoType'];
     $app['storage.repositories'] = ['Bolt\\Storage\\Entity\\Authtoken' => 'Bolt\\Storage\\Repository\\AuthtokenRepository', 'Bolt\\Storage\\Entity\\Cron' => 'Bolt\\Storage\\Repository\\CronRepository', 'Bolt\\Storage\\Entity\\LogChange' => 'Bolt\\Storage\\Repository\\LogChangeRepository', 'Bolt\\Storage\\Entity\\LogSystem' => 'Bolt\\Storage\\Repository\\LogSystemRepository', 'Bolt\\Storage\\Entity\\Users' => 'Bolt\\Storage\\Repository\\UsersRepository'];
     $app['storage.metadata'] = $app->share(function ($app) {
         $meta = new MetadataDriver($app['schema'], $app['config']->get('contenttypes'), $app['config']->get('taxonomy'), $app['storage.typemap'], $app['storage.namingstrategy']);
         return $meta;
     });
     $app['storage.record_modifier'] = $app->share(function ($app) {
         $cm = new RecordModifier($app);
         return $cm;
     });
     $app['storage.listener'] = $app->share(function () use($app) {
         return new StorageEventListener($app['storage'], $app['access_control.hash.strength']);
     });
     $app['storage.namingstrategy'] = $app->share(function ($app) {
         $strategy = new NamingStrategy($app['config']->get('general/database/prefix', null));
         return $strategy;
     });
 }