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Custom module working as desired only after adding temporarily kint or var_dump

This are "use" statements (some of them are needed for other functions) and the function from my custom module. On my localhost it was working as a charm:

use DrupalCoreRoutingRouteMatchInterface; use DrupalCoreFormFormStateInterface; use DrupalgroupEntityGroup; use DrupalgroupEntityGroupInterface; use Drupalopigno_group_managerControllerOpignoGroupManagerController; use Drupalopigno_group_managerEntityOpignoGroupManagedContent; use DrupalCoreUrl; use Drupalopigno_learning_pathPluginBlock; use Drupaltft; use DrupalCoreRoutingRouteMatchInterface; use DrupalCoreFormFormStateInterface; use DrupalgroupEntityGroup; use DrupalgroupEntityGroupInterface; use Drupalopigno_group_managerControllerOpignoGroupManagerController; use Drupalopigno_group_managerEntityOpignoGroupManagedContent; use DrupalCoreUrl; use Drupalopigno_learning_pathPluginBlock; use Drupaltft; use DrupaltftControllerTFTController; use DrupaltftControllerTFTController;  function npx_main_theme() {   /** @var DrupalgroupEntityGroup $group */   $group = Drupal::routeMatch()->getParameter('group');   if($group instanceof GroupInterface){     $tft_controller = new TFTController;     $subfolder = $tft_controller->listGroup($group);     return [       'opigno_documents_last_group_block' => [         'variables' => [           'subfolder' => $subfolder         ]       ]     ];   } }

However when I tried to make it run on dev server, it didn’t display the $subfolder, acting like it was empty. When I added kint($subfolder); like that:

function npx_main_theme() {   /** @var DrupalgroupEntityGroup $group */   $group = Drupal::routeMatch()->getParameter('group');   if($group instanceof GroupInterface){     $tft_controller = new TFTController;     $subfolder = $tft_controller->listGroup($group);     kint($subfolder);     return [       'opigno_documents_last_group_block' => [         'variables' => [           'subfolder' => $subfolder         ]       ]     ];   } }

it suddenly started to work, displaying all the subfolders and files. After I removed kint line it is still working, regardless clearing the cache. What is the reason and how can I change the code to display the files on new instances without using "kint" trick?

This article was republished from its original source.
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Custom module working as desired only after adding temporarily kint or var_dump

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