commerce_shipping_pickup_extra.install

<?php

use Drupal\Core\Field\BaseFieldDefinition;

/**
 * Implements hook_update_N().
 */
function commerce_shipping_pickup_extra_update_8001(&$sandbox) {
  \Drupal::entityTypeManager()->clearCachedDefinitions();
  \Drupal::entityDefinitionUpdateManager()
    ->installEntityType(\Drupal::entityTypeManager()
      ->getDefinition('pickup_item'));
}

/**
 * Implements hook_update_N().
 */
function commerce_shipping_pickup_extra_update_8002(&$sandbox) {
  $um = \Drupal::entityDefinitionUpdateManager();

  $storage_definition = BaseFieldDefinition::create('string')
    ->setLabel(t('Name with address'))
    ->setSettings([
      'max_length'      => 255,
      'text_processing' => 0,
    ])
    ->setDefaultValue('')
    ->setDisplayOptions('view', [
      'label'  => 'above',
      'type'   => 'string',
      'weight' => -4,
    ])
    ->setDisplayOptions('form', [
      'type'   => 'string_textfield',
      'weight' => -4,
    ])
    ->setDisplayConfigurable('form', TRUE)
    ->setDisplayConfigurable('view', TRUE)
    ->setRequired(TRUE);

  $um->installFieldStorageDefinition('name_with_address', 'pickup_item', 'pickup_item', $storage_definition);
}