In the case that you have a field on a node that you have some data in, and you wish to add this to the layout builder of the page programmatically, here is how to do so, with a landing page type node that has a field called 'field_accordion':
If you have been tasked with migrating a site from Sitecore to Drupal, you might have run into the same problem I did -- a complete lack of all documentation on the subject. There is one module called "sitecore_migrate" which has a Drupal.org page, and has a promising name, but left us with that drooping feeling of disappointment as it holds literally nothing. And I found out why... to make a module that migrates ANYTHING from Sitecore to Drupal automatically is extremely difficult as I found out firsthand. So I believe the guy had high hopes and then realized how impossible it would be.
Abstract classes may have implemented methods, whereas interfaces have no implementation in themselves.
One can implement multiple interfaces, but not extend multiple classes (or abstract classes).
An abstract class implements an interface, which defines things that your objects needs to implement. An abstract class is a like a “default” class that should be able to be easily extended by static classes that are specific to objects.