Horizontal Integration: A custom Styles library with Config Entities

In this project we had built a collection of components using a combination of Paragraphs and referenced block entities. While the system we built was incredibly flexible, there were a number of variations we wanted to be able to apply to each component. We also wanted the system to be easily extensible by the client team going forward. To this end, we came up with a system of configuration entities that would allow us to provide references to classes and thematically name these styles. We built upon this by extending the EntityReferenceSelections plugin, allowing us to customize the list of…