collectionGroup method
Creates and returns a new Query that includes all documents in the database that are contained in a collection or subcollection with the given collectionId.
The collectionId identifies the collections to query over. Every collection or subcollection with this ID as the last segment of its path will be included. Cannot contain a slash.
Implementation
Query collectionGroup(String collectionId) =>
Query.fromJsObject(jsObject.collectionGroup(collectionId));