Local path of the folder.
Subfolders directly inside, ordered by displayName and then absolutePath, ignoring case.
The folder's tracks in library order, followed with recursiveFiles by those of the folders below in no fixed order; empty without includeFiles. index is the position in the library when the tree index was built.
true when the tree index already existed before this call.
The pathId opened.
The root.
Always true here; a failed call resolves with ApiFailure instead.
Successful response from
library.browseTree.