t() calls should be avoided in classes, use dependency injection and $this->t() instead in contextual module

FILE: /var/www/html/drupal-contrib/modules/contrib/mosaicformatter/src/Plugin/Field/FieldFormatter/MosaicFormatter.php
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FOUND 0 ERRORS AND 6 WARNINGS AFFECTING 6 LINES
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122 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
125 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
264 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
267 | WARNING | t() calls should be avoided in classes, use \Drupal\Core\StringTranslation\StringTranslationTrait and $this->t() instead
312 | WARNING | \Drupal calls should be avoided in classes, use dependency injection instead
331 | WARNING | File::load calls should be avoided in classes, use dependency injection instead