When performing setAccessControlRecursive on a directory, the number of paths that are processed with each invocation is limited. If the number of paths to be processed exceeds this limit, a continuation token is returned in this response header. When a continuation token is returned in the response, it must be specified in a subsequent invocation of the setAccessControlRecursive operation to continue the setAccessControlRecursive operation on the directory.

The version of the REST protocol used to process the request.