Issue #3291700 by dww: Only define layout_builder_quickedit_render_field() if it doesn't exist.

/**

 * Implements hook_quickedit_render_field().

 */

if (!function_exists('layout_builder_quickedit_render_field')) {

  function layout_builder_quickedit_render_field(EntityInterface $entity, $field_name, $view_mode_id, $langcode) {

    /** @var \Drupal\quickedit\LayoutBuilderIntegration $layout_builder_integration */

    $layout_builder_integration = \Drupal::classResolver(LayoutBuilderIntegration::class);

    return $layout_builder_integration->quickEditRenderField($entity, $field_name, $view_mode_id, $langcode);

  }

}