Drupal 9 Deprecated Code Report

6/6 [▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100%

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Line domain_finder.install
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26 Call to deprecated method l() of class Drupal:
in Drupal 8.0.0 and will be removed before Drupal 9.0.0.
Use \Drupal\Core\Link instead.
Example:
30 Call to deprecated method l() of class Drupal:
in Drupal 8.0.0 and will be removed before Drupal 9.0.0.
Use \Drupal\Core\Link instead.
Example:
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Line src/Controller/DomainFinderController.php
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36 Call to deprecated function drupal_set_message():
in Drupal 8.5.0 and will be removed before Drupal 9.0.0.
Use \Drupal\Core\Messenger\MessengerInterface::addMessage() instead.
90 Call to deprecated function drupal_set_message():
in Drupal 8.5.0 and will be removed before Drupal 9.0.0.
Use \Drupal\Core\Messenger\MessengerInterface::addMessage() instead.
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Line src/Form/DomainFinderSearchForm.php
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85 Call to deprecated method checkPlain() of class Drupal\Component\Utility\SafeMarkup:
Will be removed before Drupal 9.0.0. Rely on Twig's
auto-escaping feature, or use the @link theme_render #plain_text @endlink
key when constructing a render array that contains plain text in order to
use the renderer's auto-escaping feature. If neither of these are
possible, \Drupal\Component\Utility\Html::escape() can be used in places
where explicit escaping is needed.
85 Call to method checkPlain() of deprecated class Drupal\Component\Utility\SafeMarkup:
Will be removed before Drupal 9.0.0. Use the appropriate
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[ERROR] Found 6 errors