t() calls should be avoided in classes

FILE: C:\xampp\htdocs\contribution\web\modules\contrib\adv_varnish\src\Form\CacheBlockForm.php
------------------------------------------------------------------------------------------------------------------------------------------
FOUND 0 ERRORS AND 3 WARNINGS AFFECTING 3 LINES
------------------------------------------------------------------------------------------------------------------------------------------
113 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
117 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
120 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
------------------------------------------------------------------------------------------------------------------------------------------

FILE: C:\xampp\htdocs\contribution\web\modules\contrib\adv_varnish\src\Form\ClearCacheForm.php
-----------------------------------------------------------------------------------------------------------------------------------------
FOUND 0 ERRORS AND 5 WARNINGS AFFECTING 5 LINES
-----------------------------------------------------------------------------------------------------------------------------------------
56 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
70 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
78 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
80 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
96 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
-----------------------------------------------------------------------------------------------------------------------------------------

FILE: C:\xampp\htdocs\contribution\web\modules\contrib\adv_varnish\tests\modules\adv_varnish_block_test\src\Plugin\UserBlocks\Example.php
-----------------------------------------------------------------------------------------------------------------------------------------
FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
-----------------------------------------------------------------------------------------------------------------------------------------
66 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
-----------------------------------------------------------------------------------------------------------------------------------------