defaultComponents: object, allows you to overwrite the global default components for all components within a container directive. Probably the most important one is the
paragraphdefault component which defines what happens upon pressing the "Enter" key. in the example above it is used to insert a new list item when pressing "Enter" in a bullet list.
defaultContent: array, defines a set of components that are available by default in the container. In the example above it is used to add one list item in the bullet list by default. ATTENTION: This applies only when the component is dragged in by a human. If a component is created by a machine (e.g. import or data migration) no default content is set.
allowedChildren: array, allows you to define which components are allowed within a certain container.