https://docs.unity3d.com/ScriptReference/Object.GetEntityId.html
Unity - Scripting API: Object.GetEntityId
scripting apiunityobject
https://api.drupal.org/api/drupal/core%21modules%21migrate%21src%21Plugin%21migrate%21destination%21Entity.php/function/Entity%3A%3AgetEntityId/9
function Entity::getEntityId | Drupal API
functionentitydrupalapi