saveDisplayStatuses example

$display = $this->getEntityDisplay($this->entity->getTargetEntityTypeId(), $this->entity->getTargetBundle(), 'default')->createCopy($mode);
            $display->save();
          }

          $display_mode_label = $display_modes[$mode]['label'];
          $url = $this->getOverviewUrl($mode);
          $this->messenger()->addStatus($this->t('The %display_mode mode now uses custom display settings. You might want to <a href=":url">configure them</a>.', ['%display_mode' => $display_mode_label, ':url' => $url->toString()]));
        }
        $statuses[$mode] = !empty($value);
      }

      $this->saveDisplayStatuses($statuses);
    }

    $this->messenger()->addStatus($this->t('Your settings have been saved.'));
  }

  /** * {@inheritdoc} */
  protected function copyFormValuesToEntity(EntityInterface $entity, array $form, FormStateInterface $form_state) {
    $form_values = $form_state->getValues();