Drupal calls should be avoided in classes, use dependency injection instead

Problem/Motivation

FILE: ...html/drupal9.3.0/web/modules/contrib/sftp_export/src/Form/SettingsForm.php
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 33 | WARNING | \Drupal calls should be avoided in classes, use dependency
    |         | injection instead
 49 | WARNING | \Drupal calls should be avoided in classes, use dependency
    |         | injection instead