Get Content Descendants By Type

Returns all descendants of a given type, for a piece of content. This issimilar to [Get content children by type](#api-content-id-child-type-get),except that this method returns child pages at all levels, rather than justthe direct child pages.A piece of content has different types of descendants, depending on its type:- `page`: descendant is `page`, `comment`, `attachment`- `blogpost`: descendant is `comment`, `attachment`- `attachment`: descendant is `com...