I have a drupal 8 custom entity and have it referencing another custom entity of a different type. It is a one-to-many relationship like a department with assets. It won't recognize the assets relationship (but it will recognize the one-to-ones). How do I make that bridge in my EntityViewsData extended class so that I can use assets in the Relationships section of the Views UI? I have scoured the docs and core entities and cannot find the answer.
More info: The department has a base table 'department' and another table 'department__assets' that the reference created. 'department_assets' has a field 'entity_id' that connects the table to the department and a field 'asset_target_id' that connects the asset table. The assets base table is 'asset'.