Drupal Deprecated method used

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Line src/Controller/FieldOperations.php
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84 Call to deprecated method entityManager() of class Drupal:
in Drupal 8.0.0 and will be removed before Drupal 9.0.0.
Use \Drupal::entityTypeManager() instead in most cases. If the needed
method is not on \Drupal\Core\Entity\EntityTypeManagerInterface, see the
deprecated \Drupal\Core\Entity\EntityManager to find the
correct interface or service.
118 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:
119 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:
120 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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[ERROR] Found 4 errors