Function places::storage::bookmarks::fetch_tree

pub fn fetch_tree(
    db: &PlacesDb, 
    item_guid: &SyncGuid, 
    target_depth: &FetchDepth
) -> Result<Option<(BookmarkTreeNode, Option<SyncGuid>, u32)>>

Fetch the tree starting at the specified guid. Returns a BookmarkTreeNode, its parent's guid (if any), and position inside its parent.