pate-1.0.0/pate.install

<?php

/**
 * @file
 * Install/Update hooks for pate.
 */

use Drupal\Core\Field\BaseFieldDefinition;

/**
 * Add the new "Structure only" basefield to nodes.
 */
function pate_update_9001() {
  $entity_definition_update_manager = \Drupal::entityDefinitionUpdateManager();
  $entity_type = $entity_definition_update_manager->getEntityType('node');

  $storage_definition = BaseFieldDefinition::create('boolean')
    ->setLabel(t('Structure only'))
    ->setDescription(t('A flag indicating whether this template should be cloned using structure-only mode.'))
    ->setRevisionable(TRUE)
    ->setTranslatable(FALSE)
    ->setDefaultValue(FALSE)
    ->setDisplayConfigurable('form', FALSE)
    ->setDisplayConfigurable('view', FALSE);

  \Drupal::entityDefinitionUpdateManager()->installFieldStorageDefinition(
      'pate_structure_only',
      $entity_type->id(),
      'pate',
      $storage_definition
    );
}