Content entities provide base field definitions and also configurable fields through the Field module. There is also support for revisions and translations with content entities. Display modes, both form and view, are available for content entities to control how the fields are edited and displayed. When an entity does not specify bundles, there is automatically one bundle instance with the same name as the entity.
In this recipe, we will create a custom content entity that does not specify a bundle. We will create a
Message entity that can serve as a content entity for generic messages.
You will need a custom module to place code into in order to implement a configuration entity type. Create an
src directory ...