List a folder's contents

One page of a folder's children, or of the vault root's when folder_id is omitted. The children are one sequence across pages: every subfolder first, in an order that holds from page to page and is not by name, then the ingots in creation order, newest first unless sort_order is asc. A page holds at most limit children, so one page can hold the last subfolders and the first ingots, and it can hold fewer, or none, without being the last: follow next_page_token until it is null. Every page carries the folder and its breadcrumb. Sort by name, size or type on the client, over the children it holds. A file moved into the folder while you page appears on a later page only when it was created before the ingots already listed (after them under asc); one moved out before its page is read does not appear; no child appears twice.