How to setup access dependency on a block content created programatically

Question

In Drupal 8, I am creating block instances (BlockContent) for node layouts programatically and setting them all as non-reusable. That causes a following access error: "Non-reusable blocks must set an access dependency".

How do I set access dependency on an existing block instance (or during it's creation)? Was never in a position to have to manipulate access from such angle and I can't find a good example for this.

Answer 1

The BlockContent class uses the RefinableDependentAccessTrait which has 2 methods that can be used to add/set access dependencies:

• RefinableDependentAccessTrait::addAccessDependency
  Adds an access dependency into the existing access dependency.
• RefinableDependentAccessTrait::setAccessDependency
  Sets the access dependency. If an access dependency is already set this will replace the existing dependency.