https://api.drupal.org/api/drupal/core%21modules%21layout_builder%21src%21Field%21LayoutSectionItemList.php/8.9.x
LayoutSectionItemList.php | Drupal API
phpdrupalapi
https://api.drupal.org/api/drupal/core%21modules%21layout_builder%21src%21Field%21LayoutSectionItemList.php/function/LayoutSectionItemList%3A%3AdefaultAccess/10
function LayoutSectionItemList::defaultAccess | Drupal API
functiondrupalapi